enum RequiredSizeError.Reason (v202502)
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https://www.google.com/apis/ads/publisher/v202502
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Last updated 2025-08-06 UTC.
[null,null,["Last updated 2025-08-06 UTC."],[],["The core content outlines the `RequiredSizeError.Reason` within the context of various services, including CreativeSetService, ForecastService, and others. It defines three enumeration values: `REQUIRED`, indicating a missing size for a Creative or LineItem; `NOT_ALLOWED`, specifying that LineItemCreativeAssociation sizes must be a subset of LineItem's creativePlaceholders sizes; and `UNKNOWN`, used when the API version doesn't expose the actual value. These rules relate to managing size requirements within ad management.\n"],null,["# enum RequiredSizeError.Reason (v202502)\n\n**Service** \n**CreativeService** [CreativeSetService](/ad-manager/api/reference/v202502/CreativeSetService.RequiredSizeError.Reason) [ForecastService](/ad-manager/api/reference/v202502/ForecastService.RequiredSizeError.Reason) [LineItemCreativeAssociationService](/ad-manager/api/reference/v202502/LineItemCreativeAssociationService.RequiredSizeError.Reason) [LineItemService](/ad-manager/api/reference/v202502/LineItemService.RequiredSizeError.Reason) [LineItemTemplateService](/ad-manager/api/reference/v202502/LineItemTemplateService.RequiredSizeError.Reason) [NativeStyleService](/ad-manager/api/reference/v202502/NativeStyleService.RequiredSizeError.Reason) [OrderService](/ad-manager/api/reference/v202502/OrderService.RequiredSizeError.Reason) [PublisherQueryLanguageService](/ad-manager/api/reference/v202502/PublisherQueryLanguageService.RequiredSizeError.Reason) **Dependencies** \n[RequiredSizeError](/ad-manager/api/reference/v202502/CreativeService.RequiredSizeError) \n▼\n**RequiredSizeError.Reason**\n\n*** ** * ** ***\n\nNamespace\n:\n `https://www.google.com/apis/ads/publisher/v202502`\n\n| Enumeration | Description |\n|---------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `REQUIRED` | [Creative.size](/ad-manager/api/reference/v202502/CreativeService.Creative#size) or [LineItem.creativePlaceholders](/ad-manager/api/reference/v202502/ForecastService.LineItem#creativePlaceholders) size is missing. |\n| `NOT_ALLOWED` | [LineItemCreativeAssociation.sizes](/ad-manager/api/reference/v202502/LineItemCreativeAssociationService.LineItemCreativeAssociation#sizes) must be a subset of [LineItem.creativePlaceholders](/ad-manager/api/reference/v202502/ForecastService.LineItem#creativePlaceholders) sizes. |\n| `UNKNOWN` | The value returned if the actual value is not exposed by the requested API version. |"]]
