Adjustable Cap Size:
| Size | Head |
| Men's OSFA | 22 - 23 1/2" |
| Women's OSFA | 21 1/4 - 22 3/4" |
| Youth OSFA | 20 7/8 - 22 3/8" |
Stretch-Fit Cap Size:
| Size | Head |
| Small/Medium | 20 7/8 - 21 1/2" |
| Medium/Large | 22 - 23" |
| Large/Extra Large | 23 - 24 1/4" |
| Extra Large/2X Large | 24 1/4 - 25 1/2" |
Fitted Cap Size:
| US Size | Head |
| 6 5/8 | 20 7/8" |
| 6 3/4 | 21 1/4" |
| 6 7/8 | 21 5/8" |
| 7 | 22" |
| 7 1/8 | 22 3/8" |
| 7 1/4 | 22 3/4" |
| 7 3/8 | 23" |
| 7 1/2 | 23 1/2" |
| 7 5/8 | 23 7/8" |
| 7 3/4 | 24 1/4" |
| 7 7/8 | 24 3/4" |
| 8 | 25 1/8" |
| 8 1/8 | 25 1/2" |
How To Measure: To figure out your UA fitted hat size, measure the circumference of your head where your hat will rest. If you don't have a tape measure, use a string and measure it against a ruler. Find your measurement on the size chart to determine your ideal UA hat size
