How do I upload a custom size chart?
As we're a global website, we highly recommend that you upload your own custom size chart for each individual product you upload with accurate sizing conversions.
A sizing image is not required, but highly recommended. Ideally, this is a sizing chart that breaks down the measurements for your sizes, as well as conversions for international sizes.
Within the sizing section, please ensure that you include as much detailed information as you can, with exact dimensions where possible. Please also try to include the size the model is wearing if you include lifestyle images.

It is especially important to upload a sizing guide, as definitions of “small, medium, etc.” can vary across brands and cultures and are rarely consistent. This will help customers select the correct size and help reduce returns.
See an example below:

Note that when you upload your own size chart it replaces the generic W&B size version, making the sizing information available to the customer more accurate.