Nike Headwear Size Chart
Sweatbands, Headbands, Flex Hats, and Headwraps are generally One Size Fits Most (OSFM)
To determine your exact cap size, use a tape measure around your head where the sweatband rests; or, 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.
Fitted hats require that you know your head size.
You do not have to measure your head if you are buying an adjustable hat.
If a Flex hat is offered in multiple sizes, use the chart below to determine which size you need.
For in-between sizes, you will probably want to buy the larger size.
Measurements below are given in inches (in.) and centimeters (cm.)
Head Size (cm.)
