According to dealers (Kakadu Traders) should be noted that own size table the dealer, not the Amazon. Then corresponds to M = 56,5-57,5cm. The sent hat with attached shield size "M" but only had a circumference of about 54,5cm. Therefore hat returned with a request to send a matching hat. The only comment from merchant "hat in the desired size out of stock" - Amazon is the hat as well, 10 days later still in all sizes in the ordered color offer. No further explanation of the dealer. The money was refunded, but not the return postage.