Size reference
Every ring size
Use this as the index behind the converter: every US half size, plus millimetre diameter pages for people measuring a ring directly.
US half sizes Each size page includes UK, EU/ISO, Japan, diameter and circumference.
Measured diameter Diameter pages cover 14 mm to 23 mm in 0.5 mm steps.
Same source table The pages mirror the canonical chart, so numbers stay consistent.
By US size
- Size 3
- Size 3.5
- Size 4
- Size 4.5
- Size 5
- Size 5.5
- Size 6
- Size 6.5
- Size 7
- Size 7.5
- Size 8
- Size 8.5
- Size 9
- Size 9.5
- Size 10
- Size 10.5
- Size 11
- Size 11.5
- Size 12
- Size 12.5
- Size 13
By millimetre (diameter)
- 14 mm
- 14.5 mm
- 15 mm
- 15.5 mm
- 16 mm
- 16.5 mm
- 17 mm
- 17.5 mm
- 18 mm
- 18.5 mm
- 19 mm
- 19.5 mm
- 20 mm
- 20.5 mm
- 21 mm
- 21.5 mm
- 22 mm
- 22.5 mm
- 23 mm