Grab a measuring tape (or use a piece of string and a ruler).
Wrap it around your head, about 1/8 inch above your ears and across the mid-forehead—this is where your hat will sit.
Hold the tape snug, but not tight.
Take note of the measurement in inches or centimeters.
| Hat Size (U.S.) | Head (inches) | Head Circ. (cm) |
|---|---|---|
| Small — 6 ¾ | 21 1/8 – 21 1/2" | 54.0 – 54.6 cm |
| Medium — 7 | 21 7/8 – 22 1/4" | 55.5 – 56.5 cm |
| Large — 7 ¼ | 22 5/8 – 23" | 57.5 – 58.5 cm |
| X-Large — 7 ½ | 23 1/2 – 23 7/8" | 59.5 – 60.5 cm |
| XX-Large — 7 ¾ | 24 1/4 – 24 5/8" | 61.5 – 62.5 cm |
