What ring size is 15 mm?
A 15 mm inner diameter is a US 4.5 — UK I½, EU 48, Japan 8. (between sizes — we suggest sizing up)
- US
- 4.5
- UK
- I½
- EU
- 48
- Japan
- 8
- Ø mm
- 15
- Circ mm
- 47.1
Explore
See the full international ring size chart · Converter
Frequently asked questions
What ring size is 15 mm?
A 15 mm inner diameter is closest to US 4.5 (UK I½, EU 48, Japan 8). It falls between sizes, so we suggest sizing up.
Is 15 mm a diameter or circumference?
On this page 15 mm is the inner diameter (the width across the inside of the ring). The matching inner circumference is about 47.1 mm.