The 2017 Official NFL Sideline 39THIRTY is a stretch fit cap that offers exceptional fit and function. The cap is made with Hex Tech and Honeycomb Tech Weave engineered fabrics which keep you dry and comfortable whether you’re on the sidelines or in the stands. Embroidered team logo on the crown and LiquidChrome NFL shield on the rear ensure everyone knows who you support.
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.
||21 5/8 - 22 3/4
||22 3/4 - 23 7/8
||23 7/8 - 25