Blue White Dark Striped Conductor's Cap Made of 100% cotton. L/XL and 2XL/3XL are available with adjustable velcrorized strap. L/XL is based at 7 1/4 fitting from M to XL.2XL/3XL is at 8 and fitting from XL to 3XL. Crown measures 4 inches deep low profi cc003ca-blue_white