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| Circumference (mm) | Internal Diameter (mm) | India Size | US/Canada Size | UK/Australia Size |
| 44.2 | 14.1 | 5 | 3 | H |
| 46.8 | 14.9 | 7 | 4 | F |
| 49.3 | 15.7 | 10 | 5 | J |
| 51.9 | 16.5 | 12 | 6 | L |
| 54.4 | 17.3 | 14 | 7 | N |
| 57.0 | 18.1 | 17 | 8 | P |
| 59.5 | 19.0 | 20 | 9 | R |
| 62.1 | 19.8 | 23 | 10 | T |
| 64.6 | 20.6 | 25 | 10 | V |
| 67.2 | 21.4 | 27 | 12 | X |
| 67.7 | 22.2 | 30 | 13 | Z |