What ring size is 17.5 mm?
A 17.5 mm inner diameter is a US 7.5 — UK O½, EU 56, Japan 15. (between sizes — we suggest sizing up)
- US
- 7.5
- UK
- O½
- EU
- 56
- Japan
- 15
- Ø mm
- 17.5
- Circ mm
- 55.0
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Frequently asked questions
What ring size is 17.5 mm?
A 17.5 mm inner diameter is closest to US 7.5 (UK O½, EU 56, Japan 15). It falls between sizes, so we suggest sizing up.
Is 17.5 mm a diameter or circumference?
On this page 17.5 mm is the inner diameter (the width across the inside of the ring). The matching inner circumference is about 55.0 mm.