Each market sizes rings differently. The US and Canada use numbers (for example 6, 7 and 8, with half sizes), the UK and Australia use letters (for example M, N and O), and much of the EU uses the inner circumference in millimetres (for example 52, 54 and 56). India has its own numbered system too, so a size quoted by a Rajkot workshop needs converting.
For women's fashion rings, most demand falls around US 6 to 8, which is roughly UK L to Q and EU 52 to 57. Men's rings run larger, commonly around US 9 to 11.
Work from millimetres
The reliable link between all systems is the inner diameter or inner circumference in millimetres. Ask the maker to quote each size as an inner diameter, check it with a ring gauge, and convert to your market from that. For example, a US 7 has an inner diameter of about 17.3 mm and a circumference of about 54 mm.
Use a recognised conversion chart from a ring-sizer supplier for your labels, and keep one chart for all your designs.
Building a size mix
- Put most pieces in the middle sizes and fewer at each end.
- Wide bands fit tighter than thin ones; some sellers advise customers to size up for bands wider than about 6 mm.
- Stones and settings on the inside can reduce the effective size, so measure finished rings.
- If a design sells, reorder by actual sales by size, not by the original mix.
The adjustable alternative
Many Rajkot rings are made adjustable, with an open band that the wearer squeezes or opens to fit. They remove sizing from the order and from your listings, and they suit online sales. See how adjustable rings are made for the trade-offs.
What this means for a buyer
Specify every ring size in mm and check finished rings on a gauge. Creston & Co works for buyers only, for a fixed fee agreed in writing, and measures rings by size during inspection. Start with a free sourcing review.