Hat Size Conversion Chart | |||
| Hat Size | Measurement in Inches | Metric Measurement | Size Code |
| 6-1/2 | 20-1/4" | 52 | X-Small |
| 6-5/8 | 20-3/4" | 53 | |
| 6-3/4 | 21-1/8" | 54 | Small |
| 6-7/8 | 21-1/2" | 55 | |
| 7 | 21-7/8" | 56 | Medium |
| 7-1/8 | 22-1/4" | 57 | |
| 7-1/4 | 22-5/8" | 58 | Large |
| 7-3/8 | 23" | 59 | |
| 7-1/2 | 23-1/4" | 60 | X-Large |
| 7-5/8 | 23-7/8" | 61 | |
| 7-3/4 | 24-1/4" | 62 | XX-Large |
| 7-7/8 | 24-5/8" | 63 | . |
| 8 | 25" | 64 | |