Sauna Hat"Hat with Ear-flaps" for Man. Thick 2.5 mm Wool Sauna Hat "Hat with Ear-flaps" for Man. Thick 2.5 mm Wool Made of wool Made in Russia The adult hats have circumference of 24 Inch. It can be stretched out to additional 1-2 inch when wet. To see and buy more styles/sizes visit http://atlantonnet.com