"We mean business when we say loud and groovy." Materials: Sewn together using Cotton fabrics. Fit & Sizing: Head Circumference: 60cm Tug on both sides of the hat after worn to get a good shape! We offer 3 sizes for our hats, but most of our hats typically come in one size that fits most adults. (sizing differs for some hat style!) Head Circumference Size Ages 52cm XXS 18 months to 3 years 55cm XS/S Child; Young teens 60cm M/L Adult *To get the best fit, measure your head circumference using a measuring tape and stick your finger under the tape so that you give room! Care Instructions: Hand wash cold and hang dry. Iron/ Steam in medium heat.