Step 1: Measure Yourself
Measure the circumference of your head using a measuring tape. Wrap it around your head at the point where the hat will sit (about an inch above your eyebrows).
Step 2: Find Your Size
Use the chart below to determine your size. If you're on the borderline between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
Nike Pro Brasil Hat - Midwest Gold/Lucky Green