diff --git a/API.labeltemplate.md b/API.labeltemplate.md
new file mode 100644
index 0000000..76aaa47
--- /dev/null
+++ b/API.labeltemplate.md
@@ -0,0 +1,146 @@
+# labeltemplate
+
+This document is auto-generated from the JSDoc comments in `src/store` by running `npm run api-doc`.
+
+## `labeltemplate.create`
+
+*Source: `src/store/labeltemplate/create.js`*
+
+Creates a new label template for the user's selected company.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `input` | `object` | Label template input. |
+| `input.name` | `string` | Template name. |
+| `input.width` | `number` | Canvas width in pixels. |
+| `input.height` | `number` | Canvas height in pixels. |
+| `input.dpi` | `number` | Printer DPI (203 or 300). |
+| `input.type` | `string` | Template type (`"zpl"`). |
+| `input.content` | `object` | Template content (JSON — label editor objects). |
+| `[input.thumb]` | `Buffer\|null` | Optional pre-rendered 50×50 1-bit PNG thumbnail. |
+| `[tx]` | `object` | Optional transaction to run within. |
+
+**Returns**
+
+`Promise<{id: number, company_id: number, name: string, width: number, height: number, dpi: number, type: string, content: object, thumb: Buffer|null}>`
+
+**Throws**
+
+`Error` — If name, content or dimensions are missing, or dpi/type is invalid.
+
+**Example**
+
+```js
+const template = await store.labeltemplate.create(googleAuthId, {
+  name: 'Product Label',
+  width: 448,
+  height: 200,
+  dpi: 203,
+  type: 'zpl',
+  content: { objects: [] },
+});
+```
+
+## `labeltemplate.delete`
+
+*Source: `src/store/labeltemplate/delete.js`*
+
+Deletes a label template for the user's selected company.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `id` | `number` | The label template ID to delete. |
+| `[tx]` | `object` | Optional transaction to run within. |
+
+**Returns**
+
+`Promise<void>`
+
+**Throws**
+
+`Error` — If template is not found.
+
+## `labeltemplate.getById`
+
+*Source: `src/store/labeltemplate/getById.js`*
+
+Retrieves a label template by its ID for the user's selected company.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `id` | `number` | The label template ID. |
+| `[tx]` | `object` | Optional transaction to run within. |
+
+**Returns**
+
+`Promise<{id: number, company_id: number, name: string, width: number, height: number, dpi: number, type: string, content: object, thumb: Buffer|null}|undefined>`
+
+**Example**
+
+```js
+const template = await store.labeltemplate.getById(googleAuthId, 1);
+// => { id: 1, company_id: 1, name: 'Product Label', width: 448, height: 200, dpi: 203, type: 'zpl', ... }
+```
+
+## `labeltemplate.list`
+
+*Source: `src/store/labeltemplate/list.js`*
+
+Lists all label templates for the user's selected company.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `[tx]` | `object` | Optional transaction to run within. |
+
+**Returns**
+
+`Promise<Array<{id: number, company_id: number, name: string, width: number, height: number, dpi: number, type: string, content: object, thumb: Buffer|null}>>`
+
+**Example**
+
+```js
+const templates = await store.labeltemplate.list(42);
+// => [{ id: 1, company_id: 1, name: 'Product Label', ... }]
+```
+
+## `labeltemplate.update`
+
+*Source: `src/store/labeltemplate/update.js`*
+
+Updates a label template for the user's selected company.
+
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `id` | `number` | The label template ID to update. |
+| `input` | `object` | Update payload (all fields optional). |
+| `[input.name]` | `string` | Template name. |
+| `[input.width]` | `number` | Canvas width in pixels. |
+| `[input.height]` | `number` | Canvas height in pixels. |
+| `[input.dpi]` | `number` | Printer DPI (203 or 300). |
+| `[input.type]` | `string` | Template type (`"zpl"`). |
+| `[input.content]` | `object` | Template content (JSON). |
+| `[input.thumb]` | `Buffer\|null` | 50×50 1-bit PNG thumbnail. |
+| `[tx]` | `object` | Optional transaction to run within. |
+
+**Returns**
+
+`Promise<{id: number, company_id: number, name: string, width: number, height: number, dpi: number, type: string, content: object, thumb: Buffer|null}>`
+
+**Throws**
+
+`Error` — If template not found, name is empty, or dpi/type is invalid.
diff --git a/src/index.js b/src/index.js
index f6a7dda..4b6aff2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -139,6 +139,11 @@ import printerList from './store/printer/list.js';
 import printerUpdate from './store/printer/update.js';
 import printerDelete from './store/printer/delete.js';
 import printerOrder from './store/printer/order.js';
+import labeltemplateCreate from './store/labeltemplate/create.js';
+import labeltemplateGetById from './store/labeltemplate/getById.js';
+import labeltemplateList from './store/labeltemplate/list.js';
+import labeltemplateUpdate from './store/labeltemplate/update.js';
+import labeltemplateDelete from './store/labeltemplate/delete.js';
 import stockAdjust from './store/stock/adjust.js';
 
 export default class LibDashStore {
@@ -377,6 +382,14 @@ export default class LibDashStore {
       order: printerOrder(provider),
     };
 
+    this.labeltemplate = {
+      create: labeltemplateCreate(provider),
+      getById: labeltemplateGetById(provider),
+      list: labeltemplateList(provider),
+      update: labeltemplateUpdate(provider),
+      delete: labeltemplateDelete(provider),
+    };
+
     this.stock = {
       adjust: stockAdjust(provider),
     };
diff --git a/src/providers/mssql/purgeSql.js b/src/providers/mssql/purgeSql.js
index c1e7bb5..f882166 100644
--- a/src/providers/mssql/purgeSql.js
+++ b/src/providers/mssql/purgeSql.js
@@ -1,6 +1,7 @@
 /** Drop order = reverse of schema create dependency order. */
 export const TABLES = [
   'manifestattachment',
+  'labeltemplate',
   'file',
   'companyuser',
   'syncpos',
diff --git a/src/providers/mssql/queries/labeltemplate.js b/src/providers/mssql/queries/labeltemplate.js
new file mode 100644
index 0000000..bccf3dd
--- /dev/null
+++ b/src/providers/mssql/queries/labeltemplate.js
@@ -0,0 +1,87 @@
+export const LABELTEMPLATE_COLUMNS = `
+    id,
+    company_id,
+    name,
+    width,
+    height,
+    dpi,
+    type,
+    content,
+    thumb
+`;
+
+export const LIST_BY_COMPANY = `
+SELECT
+${LABELTEMPLATE_COLUMNS}
+FROM labeltemplate
+WHERE company_id = @companyId
+ORDER BY id ASC
+`;
+
+export const GET_BY_COMPANY_AND_ID = `
+SELECT
+${LABELTEMPLATE_COLUMNS}
+FROM labeltemplate
+WHERE id = @id AND company_id = @companyId
+`;
+
+export const CREATE = `
+INSERT INTO labeltemplate (
+    company_id,
+    name,
+    width,
+    height,
+    dpi,
+    type,
+    content,
+    thumb
+)
+OUTPUT
+    INSERTED.id,
+    INSERTED.company_id,
+    INSERTED.name,
+    INSERTED.width,
+    INSERTED.height,
+    INSERTED.dpi,
+    INSERTED.type,
+    INSERTED.content,
+    INSERTED.thumb
+VALUES (
+    @companyId,
+    @name,
+    @width,
+    @height,
+    @dpi,
+    @type,
+    @content,
+    @thumb
+)
+`;
+
+export const UPDATE = `
+UPDATE labeltemplate
+SET
+    name = @name,
+    width = @width,
+    height = @height,
+    dpi = @dpi,
+    type = @type,
+    content = @content,
+    thumb = @thumb
+OUTPUT
+    INSERTED.id,
+    INSERTED.company_id,
+    INSERTED.name,
+    INSERTED.width,
+    INSERTED.height,
+    INSERTED.dpi,
+    INSERTED.type,
+    INSERTED.content,
+    INSERTED.thumb
+WHERE id = @id AND company_id = @companyId
+`;
+
+export const DELETE_BY_COMPANY_AND_ID = `
+DELETE FROM labeltemplate
+WHERE id = @id AND company_id = @companyId
+`;
diff --git a/src/providers/mssql/schema.js b/src/providers/mssql/schema.js
index 354e963..34b6c6c 100644
--- a/src/providers/mssql/schema.js
+++ b/src/providers/mssql/schema.js
@@ -816,6 +816,26 @@ END
 `;
 
 
+export const INIT_LABELTEMPLATE = `
+IF NOT EXISTS (SELECT * FROM sys.tables WHERE name = 'labeltemplate')
+BEGIN
+    CREATE TABLE labeltemplate (
+        id INT IDENTITY(1,1) PRIMARY KEY,
+        company_id INT NOT NULL,
+        name NVARCHAR(255) NOT NULL,
+        width INT NOT NULL,
+        height INT NOT NULL,
+        dpi INT NOT NULL,
+        type NVARCHAR(50) NOT NULL,
+        content NVARCHAR(MAX) NOT NULL,
+        thumb VARBINARY(MAX) NULL,
+        CONSTRAINT FK_labeltemplate_company FOREIGN KEY (company_id) REFERENCES company(id) ON DELETE CASCADE,
+        CONSTRAINT CK_labeltemplate_dpi CHECK (dpi IN (203, 300)),
+        CONSTRAINT CK_labeltemplate_type CHECK (type IN ('zpl'))
+    );
+END
+`;
+
 export const INIT_FILE = `
 IF NOT EXISTS (SELECT * FROM sys.tables WHERE name = 'file')
 BEGIN
@@ -919,6 +939,7 @@ export const SCHEMA_SCRIPTS = [
     INIT_POSTERMINAL,
     INIT_POSTERMINALCATEGORY,
     INIT_PRINTER,
+    INIT_LABELTEMPLATE,
     INIT_FILE,
     INIT_MANIFESTATTACHMENT,
     INIT_MANIFESTATTACHMENT_TRIGGER,
diff --git a/src/providers/sqlite3/queries/labeltemplate.js b/src/providers/sqlite3/queries/labeltemplate.js
new file mode 100644
index 0000000..acc8276
--- /dev/null
+++ b/src/providers/sqlite3/queries/labeltemplate.js
@@ -0,0 +1,12 @@
+import * as source from '../../mssql/queries/labeltemplate.js';
+import { translateQueries } from './translate.js';
+
+const queries = translateQueries(source, 'labeltemplate');
+export const {
+  CREATE,
+  DELETE_BY_COMPANY_AND_ID,
+  GET_BY_COMPANY_AND_ID,
+  LABELTEMPLATE_COLUMNS,
+  LIST_BY_COMPANY,
+  UPDATE,
+} = queries;
diff --git a/src/providers/sqlite3/schema.js b/src/providers/sqlite3/schema.js
index 93e8b94..aefc7e4 100644
--- a/src/providers/sqlite3/schema.js
+++ b/src/providers/sqlite3/schema.js
@@ -565,6 +565,21 @@ CREATE TABLE IF NOT EXISTS printer (
 `;
 
 
+export const INIT_LABELTEMPLATE = `
+CREATE TABLE IF NOT EXISTS labeltemplate (
+    id INTEGER PRIMARY KEY,
+    company_id INTEGER NOT NULL,
+    name TEXT NOT NULL,
+    width INTEGER NOT NULL,
+    height INTEGER NOT NULL,
+    dpi INTEGER NOT NULL CHECK (dpi IN (203, 300)),
+    type TEXT NOT NULL CHECK (type IN ('zpl')),
+    content TEXT NOT NULL,
+    thumb BLOB,
+    FOREIGN KEY (company_id) REFERENCES company(id) ON DELETE CASCADE
+);
+`;
+
 export const INIT_FILE = `
 CREATE TABLE IF NOT EXISTS "file" (
     id INTEGER PRIMARY KEY,
@@ -648,6 +663,7 @@ export const SCHEMA_SCRIPTS = [
     INIT_POSTERMINAL,
     INIT_POSTERMINALCATEGORY,
     INIT_PRINTER,
+    INIT_LABELTEMPLATE,
     INIT_FILE,
     INIT_MANIFESTATTACHMENT,
     INIT_MANIFESTATTACHMENT_TRIGGER,
diff --git a/src/store/labeltemplate/create.js b/src/store/labeltemplate/create.js
new file mode 100644
index 0000000..a0760ff
--- /dev/null
+++ b/src/store/labeltemplate/create.js
@@ -0,0 +1,121 @@
+import {
+  CREATE as MSSQL_CREATE,
+} from '../../providers/mssql/queries/labeltemplate.js';
+import {
+  CREATE as SQLITE_CREATE,
+} from '../../providers/sqlite3/queries/labeltemplate.js';
+import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
+import makeRunner from '../runner.js';
+
+const VALID_TYPES = new Set(['zpl']);
+const VALID_DPIS = new Set([203, 300]);
+
+function shape(row) {
+  return {
+    id: row.id,
+    company_id: row.company_id ?? row.companyId,
+    name: row.name,
+    width: row.width,
+    height: row.height,
+    dpi: row.dpi,
+    type: row.type,
+    content: typeof row.content === 'string' ? JSON.parse(row.content) : row.content,
+    thumb: row.thumb ?? null,
+  };
+}
+
+export default function create(provider) {
+  const access = resolveSelectedCompanyAccess(provider);
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const createSql = isSqlite ? SQLITE_CREATE : MSSQL_CREATE;
+
+  /**
+   * Creates a new label template for the user's selected company.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {object} input - Label template input.
+   * @param {string} input.name - Template name.
+   * @param {number} input.width - Canvas width in pixels.
+   * @param {number} input.height - Canvas height in pixels.
+   * @param {number} input.dpi - Printer DPI (203 or 300).
+   * @param {string} input.type - Template type ("zpl").
+   * @param {object} input.content - Template content (JSON).
+   * @param {Buffer|null} [input.thumb] - 50×50 1-bit PNG thumbnail buffer.
+   * @param {object} [tx] - Optional transaction to run within.
+   * @returns {Promise<{id: number, company_id: number, name: string, width: number, height: number, dpi: number, type: string, content: object, thumb: Buffer|null}>}
+   * @throws {Error} If required fields are missing or invalid.
+   *
+   * @example
+   * const template = await store.labeltemplate.create(googleAuthId, {
+   *   name: 'Product Label',
+   *   width: 448,
+   *   height: 200,
+   *   dpi: 203,
+   *   type: 'zpl',
+   *   content: { objects: [] },
+   * });
+   */
+  return async (googleAuthId, input = {}, tx) => {
+    const name = typeof input.name === 'string' ? input.name.trim() : '';
+    if (!name) {
+      throw new Error('Name required');
+    }
+
+    const width = Number(input.width);
+    if (!Number.isInteger(width) || width <= 0) {
+      throw new Error('Invalid width');
+    }
+
+    const height = Number(input.height);
+    if (!Number.isInteger(height) || height <= 0) {
+      throw new Error('Invalid height');
+    }
+
+    const dpi = Number(input.dpi);
+    if (!VALID_DPIS.has(dpi)) {
+      throw new Error('Invalid dpi: must be 203 or 300');
+    }
+
+    const type = typeof input.type === 'string' ? input.type.trim() : '';
+    if (!type || !VALID_TYPES.has(type)) {
+      throw new Error('Invalid type: must be "zpl"');
+    }
+
+    if (input.content == null) {
+      throw new Error('Content required');
+    }
+    const content = typeof input.content === 'string'
+      ? input.content
+      : JSON.stringify(input.content);
+
+    const thumb = input.thumb instanceof Buffer ? input.thumb : null;
+
+    const runner = makeRunner(provider, tx);
+    const { companyId } = await access(googleAuthId, runner);
+
+    const result = await runner.query(createSql, {
+      companyId,
+      name,
+      width,
+      height,
+      dpi,
+      type,
+      content,
+      thumb,
+    });
+
+    const row = result.rows[0] ?? {
+      id: result.insertId,
+      company_id: companyId,
+      name,
+      width,
+      height,
+      dpi,
+      type,
+      content,
+      thumb,
+    };
+
+    return shape(row);
+  };
+}
diff --git a/src/store/labeltemplate/delete.js b/src/store/labeltemplate/delete.js
new file mode 100644
index 0000000..5606ea8
--- /dev/null
+++ b/src/store/labeltemplate/delete.js
@@ -0,0 +1,35 @@
+import { DELETE_BY_COMPANY_AND_ID as MSSQL_DELETE } from '../../providers/mssql/queries/labeltemplate.js';
+import { DELETE_BY_COMPANY_AND_ID as SQLITE_DELETE } from '../../providers/sqlite3/queries/labeltemplate.js';
+import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
+import makeRunner from '../runner.js';
+
+export default function del(provider) {
+  const access = resolveSelectedCompanyAccess(provider);
+  const sql =
+    provider?.dialect === 'sqlite3' ? SQLITE_DELETE : MSSQL_DELETE;
+
+  /**
+   * Deletes a label template for the user's selected company.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {number} id - The label template ID to delete.
+   * @param {object} [tx] - Optional transaction to run within.
+   * @returns {Promise<void>}
+   * @throws {Error} If template is not found.
+   */
+  return async (googleAuthId, id, tx) => {
+    const numericId = Number(id);
+    if (!Number.isInteger(numericId) || numericId <= 0) {
+      throw new Error('Label template not found');
+    }
+
+    const runner = makeRunner(provider, tx);
+    const { companyId } = await access(googleAuthId, runner);
+
+    const result = await runner.query(sql, { id: numericId, companyId });
+
+    if (!result.rowsAffected) {
+      throw new Error('Label template not found');
+    }
+  };
+}
diff --git a/src/store/labeltemplate/getById.js b/src/store/labeltemplate/getById.js
new file mode 100644
index 0000000..f11df90
--- /dev/null
+++ b/src/store/labeltemplate/getById.js
@@ -0,0 +1,49 @@
+import { GET_BY_COMPANY_AND_ID as MSSQL_GET_BY_ID } from '../../providers/mssql/queries/labeltemplate.js';
+import { GET_BY_COMPANY_AND_ID as SQLITE_GET_BY_ID } from '../../providers/sqlite3/queries/labeltemplate.js';
+import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
+import makeRunner from '../runner.js';
+
+function shape(row) {
+  return {
+    id: row.id,
+    company_id: row.company_id ?? row.companyId,
+    name: row.name,
+    width: row.width,
+    height: row.height,
+    dpi: row.dpi,
+    type: row.type,
+    content: typeof row.content === 'string' ? JSON.parse(row.content) : row.content,
+    thumb: row.thumb ?? null,
+  };
+}
+
+export default function getById(provider) {
+  const access = resolveSelectedCompanyAccess(provider);
+  const sql =
+    provider?.dialect === 'sqlite3' ? SQLITE_GET_BY_ID : MSSQL_GET_BY_ID;
+
+  /**
+   * Retrieves a label template by its ID for the user's selected company.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {number} id - The label template ID.
+   * @param {object} [tx] - Optional transaction to run within.
+   * @returns {Promise<{id: number, company_id: number, name: string, width: number, height: number, dpi: number, type: string, content: object, thumb: Buffer|null}|undefined>}
+   *
+   * @example
+   * const template = await store.labeltemplate.getById(googleAuthId, 1);
+   */
+  return async (googleAuthId, id, tx) => {
+    const numericId = Number(id);
+    if (!Number.isInteger(numericId) || numericId <= 0) {
+      return undefined;
+    }
+
+    const runner = makeRunner(provider, tx);
+    const { companyId } = await access(googleAuthId, runner);
+
+    const result = await runner.query(sql, { id: numericId, companyId });
+    const row = result.rows[0];
+    return row ? shape(row) : undefined;
+  };
+}
diff --git a/src/store/labeltemplate/list.js b/src/store/labeltemplate/list.js
new file mode 100644
index 0000000..0173a11
--- /dev/null
+++ b/src/store/labeltemplate/list.js
@@ -0,0 +1,44 @@
+import { LIST_BY_COMPANY as MSSQL_LIST_BY_COMPANY } from '../../providers/mssql/queries/labeltemplate.js';
+import { LIST_BY_COMPANY as SQLITE_LIST_BY_COMPANY } from '../../providers/sqlite3/queries/labeltemplate.js';
+import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
+import makeRunner from '../runner.js';
+
+function shape(row) {
+  return {
+    id: row.id,
+    company_id: row.company_id ?? row.companyId,
+    name: row.name,
+    width: row.width,
+    height: row.height,
+    dpi: row.dpi,
+    type: row.type,
+    content: typeof row.content === 'string' ? JSON.parse(row.content) : row.content,
+    thumb: row.thumb ?? null,
+  };
+}
+
+export default function list(provider) {
+  const access = resolveSelectedCompanyAccess(provider);
+  const sql =
+    provider?.dialect === 'sqlite3'
+      ? SQLITE_LIST_BY_COMPANY
+      : MSSQL_LIST_BY_COMPANY;
+
+  /**
+   * Lists all label templates for the user's selected company.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {object} [tx] - Optional transaction to run within.
+   * @returns {Promise<Array<{id: number, company_id: number, name: string, width: number, height: number, dpi: number, type: string, content: object, thumb: Buffer|null}>>}
+   *
+   * @example
+   * const templates = await store.labeltemplate.list(42);
+   */
+  return async (googleAuthId, tx) => {
+    const runner = makeRunner(provider, tx);
+    const { companyId } = await access(googleAuthId, runner);
+
+    const result = await runner.query(sql, { companyId });
+    return result.rows.map(shape);
+  };
+}
diff --git a/src/store/labeltemplate/update.js b/src/store/labeltemplate/update.js
new file mode 100644
index 0000000..94c6cd4
--- /dev/null
+++ b/src/store/labeltemplate/update.js
@@ -0,0 +1,141 @@
+import {
+  GET_BY_COMPANY_AND_ID as MSSQL_GET_BY_ID,
+  UPDATE as MSSQL_UPDATE,
+} from '../../providers/mssql/queries/labeltemplate.js';
+import {
+  GET_BY_COMPANY_AND_ID as SQLITE_GET_BY_ID,
+  UPDATE as SQLITE_UPDATE,
+} from '../../providers/sqlite3/queries/labeltemplate.js';
+import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
+import makeRunner from '../runner.js';
+
+const VALID_TYPES = new Set(['zpl']);
+const VALID_DPIS = new Set([203, 300]);
+
+function shape(row) {
+  return {
+    id: row.id,
+    company_id: row.company_id ?? row.companyId,
+    name: row.name,
+    width: row.width,
+    height: row.height,
+    dpi: row.dpi,
+    type: row.type,
+    content: typeof row.content === 'string' ? JSON.parse(row.content) : row.content,
+    thumb: row.thumb ?? null,
+  };
+}
+
+export default function update(provider) {
+  const access = resolveSelectedCompanyAccess(provider);
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const getSql = isSqlite ? SQLITE_GET_BY_ID : MSSQL_GET_BY_ID;
+  const updateSql = isSqlite ? SQLITE_UPDATE : MSSQL_UPDATE;
+
+  /**
+   * Updates a label template for the user's selected company.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {number} id - The label template ID to update.
+   * @param {object} input - Update payload.
+   * @param {string} [input.name] - Template name.
+   * @param {number} [input.width] - Canvas width in pixels.
+   * @param {number} [input.height] - Canvas height in pixels.
+   * @param {number} [input.dpi] - Printer DPI (203 or 300).
+   * @param {string} [input.type] - Template type ("zpl").
+   * @param {object} [input.content] - Template content (JSON).
+   * @param {Buffer|null} [input.thumb] - 50×50 1-bit PNG thumbnail buffer.
+   * @param {object} [tx] - Optional transaction to run within.
+   * @returns {Promise<{id: number, company_id: number, name: string, width: number, height: number, dpi: number, type: string, content: object, thumb: Buffer|null}>}
+   * @throws {Error} If template not found or input invalid.
+   */
+  return async (googleAuthId, id, input = {}, tx) => {
+    const numericId = Number(id);
+    if (!Number.isInteger(numericId) || numericId <= 0) {
+      throw new Error('Label template not found');
+    }
+
+    const runner = makeRunner(provider, tx);
+    const { companyId } = await access(googleAuthId, runner);
+
+    const existing = await runner.query(getSql, { id: numericId, companyId });
+    const current = existing.rows[0];
+    if (!current) {
+      throw new Error('Label template not found');
+    }
+
+    let name = current.name;
+    if (input.name !== undefined) {
+      const cleaned = typeof input.name === 'string' ? input.name.trim() : '';
+      if (!cleaned) throw new Error('Name required');
+      name = cleaned;
+    }
+
+    let width = current.width;
+    if (input.width !== undefined) {
+      const w = Number(input.width);
+      if (!Number.isInteger(w) || w <= 0) throw new Error('Invalid width');
+      width = w;
+    }
+
+    let height = current.height;
+    if (input.height !== undefined) {
+      const h = Number(input.height);
+      if (!Number.isInteger(h) || h <= 0) throw new Error('Invalid height');
+      height = h;
+    }
+
+    let dpi = current.dpi;
+    if (input.dpi !== undefined) {
+      const d = Number(input.dpi);
+      if (!VALID_DPIS.has(d)) throw new Error('Invalid dpi: must be 203 or 300');
+      dpi = d;
+    }
+
+    let type = current.type;
+    if (input.type !== undefined) {
+      const cleaned = typeof input.type === 'string' ? input.type.trim() : '';
+      if (!cleaned || !VALID_TYPES.has(cleaned)) throw new Error('Invalid type: must be "zpl"');
+      type = cleaned;
+    }
+
+    let content = current.content;
+    if (input.content !== undefined) {
+      if (input.content == null) throw new Error('Content required');
+      content = typeof input.content === 'string'
+        ? input.content
+        : JSON.stringify(input.content);
+    }
+
+    let thumb = current.thumb ?? null;
+    if (input.thumb !== undefined) {
+      thumb = input.thumb instanceof Buffer ? input.thumb : null;
+    }
+
+    const result = await runner.query(updateSql, {
+      id: numericId,
+      companyId,
+      name,
+      width,
+      height,
+      dpi,
+      type,
+      content,
+      thumb,
+    });
+
+    const row = result.rows[0] ?? {
+      id: numericId,
+      company_id: companyId,
+      name,
+      width,
+      height,
+      dpi,
+      type,
+      content,
+      thumb,
+    };
+
+    return shape(row);
+  };
+}