GOKU SYMBOL HAT EMBROIDERED FLEXFIT CURVED BILL HAT OR FLAT BILL SNAPBACK (OSFM) SIZE CHART S/M 6 3/4 – 7 1/4″ L/XL 7 1/8 – 7 5/8″ Measure the circumference around the head, above the eyebrow and at the widest part of the head. Divide number by 3.14 for hat size.