Ring Size Chart
| US Size | UK Size | Euro Size | Inside Diameter |
| 4 | H 1/2 | 46.5 | 14.8mm |
| 4.5 | I 1/2 | 48 | 15.3mm |
| 5 | J 1/2 | 49.5 | 15.7mm |
| 5.5 | L | 50.75 | 16.2mm |
| 6 | M | 52.75 | 16.5mm |
| 6.5 | N | 54 | 16.9mm |
| 7 | O | 55.25 | 17.3mm |
| 7.5 | P | 56.5 | 17.8mm |
| 8 | Q | 57.75 | 18.2mm |
| 8.5 | Q 3/4 | 58.5 | 18.5mm |
| 9 | R 3/4 | 60 | 18.9mm |
| 9.5 | S 3/4 | 61 | 19.4mm |
| 10 | T 1/2 | 62.25 | 19.8mm |
| 10.5 | U 1/2 | 62.75 | 20.2mm |
| 11 | V 1/2 | 64.5 | 20.7mm |
| 11.5 | W 3/4 | 66 | 21.1mm |
| 12 | Y | 67.5 | 21.5mm |
| 12.5 | Z | 68.75 | 21.9mm |
| 13 | Z+1 | 70 | 22.3mm |
| 13.5 | Z+1.5 | - | 22.6mm |
| 14 | Z+2 | - | 23.2mm |