To determine your hat size, measure the CBJ. A crown brim junction (CBJ) is the measurement of the circumference of your head. Wrap a tape measure over the central forehead area and around your head to mimic the natural position of a hat, just above the brow line and ears. Check the size chart given below to find the closest match. For in-between measurements use the next size up.
Size Chart
S
M
L
XL
XXL
Inches
21 1⁄2
22 1⁄4
23
23 3⁄4
24 1⁄2
Metric (cm)
54 - 55
55 - 57
57 - 59
59 - 61
61 - 63
US Size
63⁄4 - 67⁄8
67⁄8 - 71⁄8
71⁄8 - 73⁄8
73⁄8 - 75⁄8
75⁄8 - 77⁄8
Tip for gift buying: The average female head size is Medium.
