| Diameter (mm) | Circumference (mm) | GBJ Standard Size US, Canada, Mexico |
UK, Australia, New Zealand, Ireland, South Africa | China, Japan, Hong Kong, Korea, Taiwan, Singapore, India, South America | Spain, Italy, Netherlands, Switzerland | France, Russia, Denmark, Sweden, Norway, Finland | Germany, Argentina | Brazil |
|---|---|---|---|---|---|---|---|---|
| 44,2 | 14,1 | 3 | F | 4 | 4 | 44 | 14 | 7 |
| 45,5 | 14,5 | 3,5 | G | 5 | 45 | 14,5 | 9 | |
| 46,8 | 14,9 | 4 | H | 7 | 6 | 46 | 15 | 10 |
| 48,0 | 15,3 | 4,5 | I | 8 | 8 | 48 | 15,25 | 11 |
| 49,3 | 15,7 | 5 | J1/2 | 9 | 9 | 49 | 15,75 | 13 |
| 50,6 | 16,1 | 5,5 | K1/2 | 10 | 11 | 51 | 16 | 14 |
| 51,9 | 16,5 | 6 | L1/2 | 11 | 12 | 51,7 | 16,50 | 15 |
| 53,1 | 16,9 | 6,5 | M1/2 | 13 | 13 | 53 | 17 | |
| 54,4 | 17,3 | 7 | N1/2 | 14 | 14 | 54 | 17,25 | |
| 55,7 | 17,7 | 7,5 | O1/2 | 15 | 15 | 55 | 17,75 | 19 |
| 57,0 | 18,1 | 8 | P1/2 | 16 | 17 | 57 | 18 | 20 |
| 58,3 | 18,5 | 8,5 | Q1/2 | 17 | 18 | 58 | 18,50 | 21 |
| 59,5 | 19,0 | 9 | R1/2 | 18 | 19 | 59 | 19 | |
| 60,8 | 19,4 | 9,5 | S1/2 | 19 | 21 | 61 | 19,50 | 24 |
| 62,1 | 19,8 | 10 | T1/2 | 20 | 22 | 62 | 20 | 25 |
| 63,4 | 20,2 | 10,5 | U1/2 | 22 | 23 | 63 | 20,25 | 26 |
| 64,6 | 20,6 | 11 | V1/2 | 23 | 24 | 64 | 20,75 | |
| 65,9 | 21,0 | 11,5 | W1/2 | 24 | 26 | 66 | 21 | |
| 67,2 | 21,4 | 12 | X1/2 | 25 | 27 | 67 | 21,25 | 30 |
| 68,5 | 21,8 | 12,5 | Y1/2 | 26 | 28 | 68 | 21,75 | 31 |
| 69,7 | 22,2 | 13 | Z | 27 | 30 | 70 | 22 | 32 |
