PLEASE CHOOSE COLOR! FOR MHSAA umpires only. Hat meets specifications mandated by MHSAA. Available in three sizes. Small 6 3/4-7 1/8 - Medium 7 1/4-7 1/2 - Large 7 5/8-8. Choose between combo or base hat. Note: Combo cap is 4 stitch 2" bill. Combo hat can be used behind plate and on base, but it is better served being used on plate only.