size_system [size_system]: Definition

With the size_system [size_system] attribute you can explain which country's sizing system your product uses. This information helps create accurate filters, which users can use to narrow search results. The sizing system that you submit will affect search, filtering, and how variants are shown in your ad.

When to use

Optional for each product

If you submit a size through the size [size] attribute, submit the size_system [size_system] attribute to explain which system you're using. 


Follow these formatting guidelines to make sure that we understand the data that you're submitting.

For details on when and how to submit values in English, learn more about submitting your product data

Supported values
  • AU
  • BR
  • CN (China)
  • DE
  • EU
  • FR
  • IT
  • JP
  • MEX
  • UK
  • GB
Repeated field No
File format Example entry


XML feeds <g:size_system>GB</g:size_system>

To format your data for Content API, have a look at the Content API for Shopping.


Follow these guidelines to make sure that you submit high quality data for your products.

Minimum requirements

These are the requirements that you'll need to meet to show your product. If you don't follow these requirements, we'll disapprove your product and let you know on the Diagnostics page of your Merchant Center account.

  • Ensure that you only use this attribute if you are sure that your product doesn't have any assigned unique product identifiers. 
  • Products for which the identifier_exists [identifier_exists] attribute is incorrectly set to no [no] or false [false], and for which there is evidence that a unique product identifier exists, will be disapproved.

Best practices

These best practices can help you go beyond the basic requirements to optimise your product data for performance.

  • Submit the size system for all clothing products. By submitting your product's size system, you can help ensure that the size is shown correctly.
  • Submit the correct system for each product. If you have different products each with different size systems, make sure to submit the correct size system. If you don't submit a size system, we'll use the standard system for your target country, which might not be right for your product.
  • Submit the size [size] attribute. Along with the size system, make sure to submit the specific size of your product using the size [size] attribute.
  • Submit the size_type [size_type] attribute if relevant. If your product also has a size type, submit the size_type [size_type] attribute.
  • Submit the gender [gender] attribute if relevant. To help show your product in the right search results, also submit the gender [gender] attribute.


Product Skater dress
target country [target country] UK
title [title] Black skater polka-dot dress, 12
size_system [size_system] UK
size_type [size_type] petite
size [size] 12
gender [gender] female


Product Tennis shoes
target country [target country] GB
title [title] White tennis shoes, 9.5
size_system [size_system] GB
gender [gender] male
size [size] 9.5

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