Pittsburgh Steelers New Era 39THIRTY Sideline Training 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.
|Size||Head Circumference (in.)|
|S / M||21 5⁄8 - 22 3⁄4|
|M / L||22 3⁄4 - 23 7⁄8|
|L / XL||23 7⁄8 - 25|