SOU・SOU × Le Coq Sportif These are so cute, please consider purchasing them! ^_^ Used 1-2 times after purchase, never used outdoors, and stored at home. Size: M size, I believe. For me, with a head size of 56.8cm-57cm, it fits perfectly without being too tight or falling off. Features adjustable Velcro. Quoted from the official website: M (Head circumference (inner circumference): 58-59 cm, Brim: 5.5 cm, Depth: 9 cm) Material: Outer: 74% Wool, 17% Polyester, 9% Regenerated Fiber (Rayon) Lining: 100% Cotton 【Ise Cotton (Pattern)】 Boa: 60% Acrylic, 40% Polyester