Ring size 11 in millimetres

US ring size 11 is 20.57 mm inner diameter and 64.6 mm circumference.

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

50 mm reference

Actual-size print check Inner diameter: 20.57 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 11: UK · EU · Japan

Frequently asked questions

What is ring size 11 in mm?

US ring size 11 has an inner diameter of 20.57 mm and an inner circumference of 64.6 mm.

What is US 11 in UK, EU and Japan ring sizes?

US 11 converts to UK V½, EU/ISO 65, Japan 23, and Switzerland/Italy/Spain 25.

Is ring size 11 small or large?

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