Ring size 10 in millimetres

US ring size 10 is 19.76 mm inner diameter and 62.1 mm circumference.

Proportional only — actual on-screen size depends on your display.

50 mm reference

Actual-size print check Inner diameter: 19.76 mm. Print at 100% and verify the 50 mm reference bar before comparing a ring.

This is around the average men’s ring size (US 9–10). See the full international ring size chart · Converter

Convert size 10: UK · EU · Japan

Frequently asked questions

What is ring size 10 in mm?

US ring size 10 has an inner diameter of 19.76 mm and an inner circumference of 62.1 mm.

What is US 10 in UK, EU and Japan ring sizes?

US 10 converts to UK T½, EU/ISO 62, Japan 20, and Switzerland/Italy/Spain 22.

Is ring size 10 small or large?

This is around the average men’s ring size (US 9–10).