- the page in the product metafield custom.size_chart (a page reference), for pieces with their own sizing;
- the Size guide page chosen in the Variant picker block, for your store-wide guide;
- the built-in ring size table, with US, UK and EU sizes, inside circumference and diameter, and three measuring steps.

The size guide drawer with the built-in ring size table
In the theme editor

Ring sizes and the size guide link are set on the Variant picker block of 1 Product information · 2 its settings · 3 the preview
