RG | Diameter (mm) | Circumference (mm) | RG | Diameter (mm) | Circumference (mm) |
1 | 13 | 40.8 | 16 | 18 | 56.5 |
2 | 13+1/3 | 41.9 | 17 | 18+1/3 | 57.6 |
3 | 13+2/3 | 42.9 | 18 | 18+2/3 | 58.6 |
4 | 14 | 44.0 | 19 | 19 | 59.7 |
5 | 14+1/3 | 45.0 | 20 | 19+1/3 | 60.7 |
6 | 14+2/3 | 46.1 | 21 | 19+2/3 | 61.8 |
7 | 15 | 47.1 | 22 | 20 | 62.8 |
8 | 15+1/3 | 48.2 | 23 | 20+1/3 | 63.9 |
9 | 15+2/3 | 49.2 | 24 | 20+2/3 | 64.9 |
10 | 16 | 50.3 | 25 | 21 | 66.0 |
11 | 16+1/3 | 51.3 | 26 | 21+1/3 | 67.0 |
12 | 16+2/3 | 52.4 | 27 | 21+2/3 | 68.1 |
13 | 17 | 53.4 | 28 | 22 | 69.1 |
14 | 17+1/3 | 54.5 | 29 | 22+1/3 | 70.2 |
15 | 17+2/3 | 55.5 | 30 | 22+2/3 | 71.2 |