Customiser sections

Update the sizes section

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PATCH/api/v3/customisers/{customiser_id}/sizes-section

Update the sizes section

Partially update the sizes section with a JSON Merge Patch (RFC 7396): the request body is a JSON object that contains only the properties to change. Omitted properties are unchanged, null clears a property that can hold null, and an empty object {} is a valid no-op. This section accepts title, description and border_margin_cm. Any other property is refused with a 422 problem with code `unknown_field`, and `object`, `customiser_id` and `updated_at` are refused as read-only. The first write creates the section. Requires the `customisers:write` scope. title and description are customiser text in the authoring language. A write replaces an unpublished Languages draft of the same text, and the response then lists the replaced keys in meta.replaced_drafts. border_margin_cm accepts 0 to 100 centimetres, and null stores 0. To write it in inches, send border_margin_in, with authored_units.border_margin_cm set to inches. A pair that disagrees is a 422 problem with code `conflicting_units`, and a `unit_revision` that is not the Store's current unit revision is a 409 problem with code `stale_revision`. A margin above 0 is refused on /border_margin_cm while the customiser has a backboard whose shape comes from the design (custom shape): border margins need free-rectangle backboards, so set the margin to 0 first. A successful update immediately changes the storefront: the customiser's cached configuration is invalidated and translated language content is resynchronised. It never regenerates your Shopify products, product images, or product cache. Send an `Idempotency-Key` header (1-255 visible ASCII characters, e.g. a UUID) to make the write safe to retry: repeating the same key with the same body replays the original response (marked `Idempotency-Replay: true`) without executing again; the same key with a different body is a 409 problem with code `idempotency_key_conflict`. The header is optional here, as on the option families' update operations. Validation failures are 422 problems: `validation_failed` lists every field error in `errors[]` with a JSON `pointer`. A 400 problem means the body is not valid JSON; a 422 problem with code `invalid_document` means the body is not a JSON object. 401/403/404/429 behave as on the read operation, with `customisers:write` as the required scope.

Overview

This section accepts title, description and border_margin_cm. Any other property is refused with a 422 problem with code unknown_field, and object, customiser_id and updated_at are refused as read-only. The first write creates the section. Requires the customisers:write scope. title and description are customiser text in the authoring language. A write replaces an unpublished Languages draft of the same text, and the response then lists the replaced keys in meta.replaced_drafts. border_margin_cm accepts 0 to 100 centimetres, and null stores 0. To write it in inches, send border_margin_in, with authored_units.border_margin_cm set to inches. A pair that disagrees is a 422 problem with code conflicting_units, and a unit_revision that is not the Store's current unit revision is a 409 problem with code stale_revision. A margin above 0 is refused on /border_margin_cm while the customiser has a backboard whose shape comes from the design (custom shape): border margins need free-rectangle backboards, so set the margin to 0 first. A successful update immediately changes the storefront: the customiser's cached configuration is invalidated and translated language content is resynchronised. It never regenerates your Shopify products, product images, or product cache. Send an Idempotency-Key header (1-255 visible ASCII characters, e.g. a UUID) to make the write safe to retry: repeating the same key with the same body replays the original response (marked Idempotency-Replay: true) without executing again; the same key with a different body is a 409 problem with code idempotency_key_conflict. The header is optional here, as on the option families' update operations. Validation failures are 422 problems: validation_failed lists every field error in errors[] with a JSON pointer. A 400 problem means the body is not valid JSON; a 422 problem with code invalid_document means the body is not a JSON object. 401/403/404/429 behave as on the read operation, with customisers:write as the required scope.

Authorisation

Bearer token required. Include it in the Authorization header.

Required scope: customisers:write

Path parameters

customiser_idstringpathrequired

The customiser id, from the list customisers operation.

Example: 1

Request body

titlestringbody

descriptionstringbody

border_margin_cmnumberbody

Request body example

{
  "title": "Choose your size",
  "description": "Pick one of our sizes.",
  "border_margin_cm": 2.5
}

Update the sizes section

curl https://web.signcustomiser.com/api/v3/customisers/1/sizes-section \
  --request PATCH \
  --header 'Accept: application/json' \
  --header 'Authorization: Bearer YOUR_API_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{
  "title": "Choose your size",
  "description": "Pick one of our sizes.",
  "border_margin_cm": 2.5
}'

{
  "data": {
    "object": "size_section",
    "customiser_id": 42,
    "title": "Choose your size",
    "description": "Pick one of our sizes.",
    "border_margin_cm": 2.5,
    "border_margin_in": 0.984252,
    "authored_units": {
      "border_margin_cm": "centimetres"
    },
    "updated_at": "2026-05-04T09:12:31Z"
  },
  "links": {
    "self": "https://web.signcustomiser.com/api/v3/customisers/42/sizes-section",
    "documentation": "https://www.signcustomiser.com/help/api/"
  },
  "meta": {
    "api_version": "v3",
    "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
  }
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/malformed_json",
  "title": "Malformed JSON",
  "status": 400,
  "code": "malformed_json",
  "detail": "The request body is not valid JSON: Syntax error.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/missing_api_key",
  "title": "Missing API key",
  "status": 401,
  "code": "missing_api_key",
  "detail": "Provide a store API key as a bearer token: Authorization: Bearer <api key>. Keys are created in the merchant admin under Integrate → API Tokens.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/insufficient_scope",
  "title": "Insufficient scope",
  "status": 403,
  "code": "insufficient_scope",
  "detail": "This operation requires the customisers:write scope, but the API key grants the following scopes: customisers:read. Create a key that includes the required scope in the merchant admin under Integrate → API Tokens.",
  "required_scopes": [
    "customisers:write"
  ],
  "granted_scopes": [
    "customisers:read"
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/resource_not_found",
  "title": "Resource not found",
  "status": 404,
  "code": "resource_not_found",
  "detail": "The requested resource does not exist or does not belong to the authenticated store.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/idempotency_key_conflict",
  "title": "Idempotency key conflict",
  "status": 409,
  "code": "idempotency_key_conflict",
  "detail": "This Idempotency-Key was already used for a different request body on this operation. An idempotency key identifies one exact request: retry the original body to replay its response, or send the new body with a fresh key.",
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/validation_failed",
  "title": "Validation failed",
  "status": 422,
  "code": "validation_failed",
  "detail": "The request payload failed validation. Correct the fields listed in errors and retry.",
  "errors": [
    {
      "pointer": "/title",
      "code": "string",
      "detail": "The title field must be a string."
    }
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/unknown_field",
  "title": "Unknown field",
  "status": 422,
  "code": "unknown_field",
  "detail": "The request contains fields this operation does not define: /selection_type.",
  "errors": [
    {
      "pointer": "/selection_type",
      "code": "unknown_field",
      "detail": "The field \"selection_type\" is not supported by this operation."
    }
  ],
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}

{
  "type": "https://www.signcustomiser.com/help/api/problems/rate_limited",
  "title": "Too many requests",
  "status": 429,
  "code": "rate_limited",
  "detail": "You have exceeded the request limit for this API key. Wait 60 seconds, then retry.",
  "retry_after": 60,
  "request_id": "req_01jz9x2k7c8f3m5n6p7q8r9s0t"
}