Artificial FurSoft, Warm and SuppleCrushable98% Polyester - 2% PolyurethaneArtificial silk liningNylon headbandCrown: 9 cmBrim: 5 cmKANGOL's authentication logoAdvice for sizeSimply measure the circumference of your head holding the measuring tape snug, but not too tight. Just above your ears - which is right about where your hat will sit. No measuring tape? No problem. Cut a 30'' piece of string. Use the string to measure your head, then measure the length of string used.