Kingston K Harris Tweed wool flat cap by Göttmann 663

Exterior: 100% baumwolle -wool

Lining: 39% wool 18% viscose 15% polyester 11% poly acrylic 8% polyamid 5% cotton 4% silk 

made in Poland 

Simply 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.