The size chart feature in the Atlas theme allows you to display a size chart directly in the variant picker.
To add a size chart to your product page, follow these steps:
Online Store > Pages.Add page and create a new page for your size chart. Include all relevant sizing information and save the page.Online Store > Themes and clicking Edit theme on the Atlas theme.Online Store > Themes.Size, Band size
You can also use metafields to assign different size charts to different products. This allows for more flexibility and customization.
Settings > Metafields.Products and then Add definition.Page reference.Online Store > Themes and clicking Edit theme on the Atlas theme.