39 Thirty New Era Hat. 100% cotton in front two panels; 100% polyester Spacer Mesh in mid and back panels. Stretch fitting on the back. This hat is embroidered. The fish is one color and the SP07 is another. S/M is 7 1/8 - 7 3/8. M/L is 7 3/8 - 7 5/8. L/XL is 7 5/8 - 7 7/8.