6 Panel Constructed flat peak (A-Class, A-Flex) with deluxe buckram laminated front panels with complete Pro-stitch. Flat peak with 8 rows of stitching, fitted back with elasticized sweatband. Fitted sizes: Imperial 7 - 7 1/8 S/M, 7 1/4 - 7 3/8 L/XL, 7 1/2 - 7 5/8 XXL; Metric 57 - 58 S/M, 59 - 60 L/XL, 61-62 XXL; Inches 22 1/2" - 22 7/8" S/M, 23 1/4" - 23 5/8" L/XL, 23 7/8 - 24 3/8 XXL.