Ring size 7.5 in millimetres

US ring size 7.5 is 17.73 mm inner diameter and 55.7 mm circumference.

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

50 mm reference

Actual-size print check Inner diameter: 17.73 mm. Print at 100% and verify the 50 mm reference bar before comparing a ring.

This sits between the average women’s (US 6–6½) and men’s (US 9–10) sizes. See the full international ring size chart · Converter

Frequently asked questions

What is ring size 7.5 in mm?

US ring size 7.5 has an inner diameter of 17.73 mm and an inner circumference of 55.7 mm.

What is US 7.5 in UK, EU and Japan ring sizes?

US 7.5 converts to UK O½, EU/ISO 56, Japan 15, and Switzerland/Italy/Spain 16.

Is ring size 7.5 small or large?

This sits between the average women’s (US 6–6½) and men’s (US 9–10) sizes.