Niche verticals May 15, 2027 5 min read
Size Guide for Ring Brands
Ring brands use US (4-13), UK (alphabet letters), or EU (inner circumference mm). Get measured at jewelry store first time. Engagement + wedding rings often need professional sizing.
The Chart
| Brand | Sizing | Resizing Policy |
|---|---|---|
| Tiffany | US | Free first resize |
| Cartier | EU mm | Free first resize |
| Mejuri | US | One free resize |
| Catbird | US | Charges for resize |
| James Allen | US | Free first resize |
FAQs
Print at home sizer?
Many brands offer printable PDF sizer. Calibrate against credit card. Acceptable accuracy for casual rings — use jeweler for engagement/wedding.
Wide vs thin band?
Wide bands (4mm+) feel tighter for same numerical size. Many jewelers recommend going up half size for wide bands. Thin bands (2mm or less) fit true.
Need this on your store?
Tailor Size Guide ships pre-built size charts for Shopify.