| Head Circumference | Adult Hat Size | ||||
| Inches | Centimeters | Fitted | Easy Fit | Sized Stretch Fit | Stretch Fit/Adjustable |
| 21 1/4 | 54 | 6 3/4 | Small (S) | Small/Medium (S/M) | |
| 21 5/8 | 55 | 6 7/8 | |||
| 22 | 55.9 | 7 | Medium (M) | One Size Fits Most | |
| 22 3/8 | 56.8 | 7-1/8 | Medium/Large (M/L) | ||
| 22 3/4 | 57.8 | 7-1/4 | Large (L) | ||
| 23 1/8 | 58.7 | 7 3/8 | |||
| 23 1/2 | 59.7 | 7 1/2 | XL | Large/XL (L/XL) | |
| 23 7/8 | 60.6 | 7 5/8 | |||
| 24 1/4 | 61.6 | 7 3/4 | XXL | ||
| 24 5/8 | 62.5 | 7 7/8 | |||
| 25 | 63.5 | 8 | |||
| Head Circumference | Children's Hat Size | |||||||
| Inches | Centimeters | Fitted | Easy Fitted | Stretch Fitted | Kids | |||
| 18 1/2 | 47 | Infant | ||||||
| 19 | 48 | 6 | XSM | |||||
| 19 3/8 | 49.2 | 6 1/8 | S | Toddler | ||||
| 19 3/4 | 50.2 | 6 1/4 | S/M | |||||
| 20 1/8 | 51 | 6 3/8 | M | Child | ||||
| 20 1/2 | 52 | 6 1/2 | ||||||
| 20 7/8 | 53 | 6 5/8 | L | L/X | Youth | |||
| 21 1/4 | 54 | 6 3/4 | ||||||
| 21 5/8 | 55 | 6 7/8 | XL | |||||
| 22 | 55.9 | 7 | ||||||
*These charts are for reference only. Fit may vary depending on the construction, materials and manufacturer.
