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NBA Hat Sizing




Determine Your Hat Sizing

Choosing the right size fitted hat is an important yet simple process. Fitted hats require that you know your head size. You do not have to measure your head if you are buying an adjustable hat. To figure out your hat size, measure your head with a tape measure about a half-inch above your eyebrows where your hat will rest. If you don't have a tape measure, use a string and measure it against a ruler. If you are unsure or between sizes, buy the larger size. Use the charts below when choose your hat style.


New Era Caps

NBA's New Era caps come in distinct styles. Browse from the 59FIFTY structured fitted cap, 39THIRTY stretch fit, 9FIFTY snapback, or 9FORTY structured adjustable.


Men's Sizing
Style Size Hat Size Circumference (in) Circumference (cm)
39Thirty Small - Medium 6 7/8 - 7 1/4 21 5/8 - 22 3/4 54.9 - 57.7
Medium - Large 7 1/4 - 7 5/8 22 3/4 - 23 7/8 57.7 - 60.6
Large - XLarge 7 5/8 - 8 23 7/8 - 25 60.6 - 63.5
29Twenty Small 7 1/4 22 3/4 57.7
Medium 7 3/8 23 1/8 58.7
Large 7 1/2 23 1/2 59.6
XLarge 7 5/8 23 7/8 60.6
9Twenty / 9Forty One Size 7 - 7 5/8 22 - 23 7/8 55.8 - 60.6
Knit One Size 7 - 7 3/4 22 - 24 1/4 55.8 - 61.5

Kids' Sizing
Style Size Hat Size Circumference (in) Circumference (cm)
39Thirty Child / Youth 6 1/2 - 6 7/8 20 1/2 - 21 5/8 52 - 54.9
29Twenty One Size Fits Most 6 3/8 - 6 7/8 20 1/2 - 21 5/8 51.1 - 54.9

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The NBA adidas flex hats come in kids, women, and men's sizing.


Men's Flex Sizing
Size Hat Size Circumference (in) Circumference (cm)
Youth 6 5/8 - 7 21 - 21 5/8 53 - 55
Adult S/M 7 - 7 1/4 22 1/8 - 23 56 - 58
Adult L/XL 7 3/8 - 7 5/8 23 3/8 - 24 59 - 61
Adult XL/XXL 7 3/4 - 8 24 1/2 - 25 1/8 62 - 64
Adult XXL/XXX: 8 1/8 - 8 3/8 25 5/8 - 26 3/8 65 - 67

Womens Flex Sizing
Womens S/M 6 5/8 - 7 21 - 21 5/8 53 - 55
Womens L/XL 7 - 7 1/4 22 1/8 - 23 56 - 58

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Pay homage to the past with retro '47 brand hats. These caps come in adjustable, fitted, and stretch styles for men, women, and kids.


Adjustable Hats
Style Size Centimeters
Adjustable Hats and Visors Newborn w/ Elastic 45-47
Infant w/ Elastic 58-50
Infant 49
Toddler 51-53
Toddler w/ Elastic 51
Kids 54
Youth 56
Womens 57.5-58
OSFA 59
Fitted Hats
Style Size Centimeters
Franchise XXS 53
XS 54
S 55.5
M 57
L 58
XL 60.5
XXL 62
3XL 63
4XL 64
5XL 65
Women's Franchise S 54
M 55.5
L 57
Fitted Wool 6 7/8 55
7 56
7 1/8 57
7 1/4 58
7 3/8 59
7 1/2 60
7 5/8 61
7 3/4 62
7 7/8 63
8 64
Driver Cap Fitted S 56
M 57
L 59
XL 61
Bucket Hats S 56
M 57
M/L not stretch 58
L 59
L/XL not stretch 60
XL 61
XXL 62
Stretch Fit Hats
Style Size Centimeters
Twins & Ottoman Flex w/ Curved Visor Infant 46 - 48
Toddler 48 - 50
Youth 52-54
S/M 55 - 57
One Size 56.5 - 58.5
L/XL 59-61
Twins Flex w/ Flat Brim Visor Youth 53 - 55
S/M 55 - 57
One Size (OSS) 57 - 59
L/XL 60 - 62
Wool Stretch Women One Size (W-OS) 54 - 56
S/M 55.5-57.5
One Size (OSS) 57 - 59
L/XL 58.5 - 60.5
Painters Cap Stretch Youth 52 - 53
S/M 56 - 57
One Size (OSS) 56.5 - 58.5
One Size (OSS) 57 - 58
L/XL 57.5 - 58.5
Lycra Stretch Fit Infant 46 - 50
Toddler 48 - 52
Kids 50 - 54
Youth 52 - 56
S/M 54 - 58
One Size (OSS) 56 - 60
L/XL 58 - 62
Mesh Stretch Fit S/M 55.5 - 57.5
One Size (OSS) 56.5 - 58.5
L/XL 58 - 60
Gatsby Stretch S/M 55 - 57
One Size (OSS) 57 - 58
L/XL 59 - 61
Driver Cap Stretch S/M 56 - 57
One Size (OSS) 57 - 58
L/XL 59 - 60

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