Using a tailor's tape measure, measure the circumference of the cadet's head. Look for the aproximate measurement on the chart and cross-reference to the appropriate cap size.
| Approximate Measurement | Men's Size | Women's Size |
|---|---|---|
| 20 1/8 | 6 3/8 | 20 |
| 20 1/2 | 6 1/2 | 20 1/2 |
| 20 7/8 | 6 5/8 | 21 |
| 21 1/4 | 6 3/4 | 21 1/2 |
| 21 5/8 | 6 7/8 | 21 1/2 |
| 22 | 7 | 22 |
| 22 3/8 | 7 1/8 | 22 1/2 |
| 22 3/4 | 7 1/4 | 22 1/2 |
| 23 1/8 | 7 3/8 | 23 |
| 23 1/2 | 7 1/2 | 23 1/2 |
| 23 7/8 | 7 5/8 | 24 |
| 24 1/4 | 7 3/4 | 24 1/2 |
| 24 5/8 | 7 7/8 | 24 1/2 |
| 25 | 8 | 25 |