How to determine your hat size
It’s important to measure your head properly for correct fit. The idea is to measure your head exactly where the hat will sit. Use a tape measure (or a length of string that you will have to hold up to a tape measure) to measure the widest part of your head. Place the string or tape around your head just above the ears and eyebrows, completely circling your head. Hold the tape firmly, but not too tightly. Record your measurement to the nearest 1/8 inch. If your measurement falls between sizes, choose the next largest size.
Use the chart below to match your head measurement to the corresponding hat size.