Flexfit® Pro-Baseball Shape Wooly Combed Twill Cap. Flexfit® Pro-Baseball Shape Wooly Combed Twill Cap. Pro-Baseball on-field shape 6-panel cap with hard buckvram and rounded flat visor. 3¾” crown with 6 sewn eyelets while the bill has 8 rows of stitching. 63/34/3% polyester/cotton/spandex. Silver undervisor. Sizes: S/M, L/XL. Colors: White, Black, Dark Grey, Light Navy, Red, Royal. Sizes: S/M: (6 3/4"-7 1/4") L/XL: (7 1/8-7 5/8)