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Baseball Cap Conversion Chart

To help you find the correct size, measure the circumference of the head above the ears and refer to the conversion chart below. These are an approximation as some brands may differ slightly because of materials and design.

Adjustable Cap Size

S/M L/XL
6 1/2 - 7 1/4 7 - 8

Pro Stretch Cap Size

Small Medium Large X-Large
6 1/2 - 6 3/4 6 7/8 - 7 1/8 7 1/4 - 7 1/2 7 5/8 - 7 7/8

Fitted Cap Size

(*Also used to size Catcher's Headgear)

INCHES SIZE
20 7/8" 6 5/8
21 1/4" 6 3/4
21 5/8" 6 7/8
22" 7
22 2/3" 7 1/8
22 3/4" 7 1/4
23 1/8" 7 3/8
23 1/2" 7 1/2
23 7/8" 7 5/8
24 1/4" 7 3/4
24 5/8" 7 7/8
25 8
​