Inches |
Ounces |
Irons |
Millimetres |
| 1/64 | 1 | 3/4 | 0.4 |
| 1/32 | 2 | 1½ | 0.8 |
| 3/64 | 3 | 2¼ | 1.2 |
| 1/16 | 4 | 3 | 1.6 |
| 5/64 | 5 | 3¾ | 2.0 |
| 3/32 | 6 | 4½ | 2.4 |
| 7/64 | 7 | 5¼ | 2.8 |
| 1/8 | 8 | 6 | 3.2 |
| 9/64 | 9 | 6¾ | 3.6 |
| 5/32 | 10 | 7½ | 4.0 |
| 11/64 | 11 | 8¼ | 4.4 |
| 3/16 | 12 | 9 | 4.8 |
| 13/64 | 13 | 9¾ | 5.2 |
| 7/32 | 14 | 10½ | 5.6 |
| 16/64 | 15 | 11¼ | 6.0 |
| 1/4 | 16 | 12 | 6.4 |
| 17/64 | 17 | 12¾ | 6.7 |
| 9/32 | 18 | 13½ | 7.1 |
| 19/64 | 19 | 14¼ | 7.6 |
| 5/16 | 20 | 15 | 8.0 |
| 21/64 | 21 | 15¾ | 8.4 |
| 11/32 | 22 | 16½ | 8.8 |
| 23/64 | 23 | 17¼ | 9.2 |
| 3/8 | 24 | 18 | 9.6 |
