Nominal Thickness Conversion Table
|
| Inches | Millimetres | Irons | Ounces |
| 0.016 | 0.40 | | 1 |
| 0.020 | 0.50 | 1 | |
| 0.024 | 0.60 | | 1.5 |
| 0.028 | 0.70 | | |
| 0.032 | 0.80 | 1.5 | 2 |
| 0.039 | 1.00 | | 2.5 |
| 0.043 | | 2 | |
| 0.047 | | | 3 |
| 0.049 | 1.25 | | |
| 0.053 | | 2.5 | |
| 0.055 | | | 3.5 |
| 0.059 | 1.50 | | |
| 0.063 | | 3 | 4 |
| 0.071 | 1.75 | | 4.5 |
| 0.074 | | 4.5 | |
| 0.079 | 2.00 | | 5 |
| 0.084 | | 4 | |
| 0.087 | | | 5.5 |
| 0.089 | 2.25 | | |
| 0.095 | | 4.5 | 6 |
| 0.098 | 2.50 | | |
| 0.102 | | | 6.5 |
| 0.105 | | 5 | |
| 0.108 | 2.75 | | |
| 0.110 | | | 7 |
| 0.114 | | 5.5 | |
| 0.118 | 3.00 | | 7.5 |
| 0.126 | | 6 | 8 |
| 0.128 | 3.25 | | |
| 0.134 | | | 8.5 |
| 0.138 | 3.50 | 6.5 | 8.5 |
| 0.142 | | | 9 |
| 0.148 | 3.75 | 7 | |
| 0.150 | | | 9.5 |
| 0.158 | 4.00 | 7.5 | 10 |
|