ROYAL Adult Baseball/Softball Stirrup and Sock Two-in-One 70% cotton Two-in-One Baseball/Softball Stirrup and Sock. Comfortable and Durable available in 13 Different Colors 70% Cotton/30% Stretch Nylon. 4 Sizes: Youth/T-Ball Shoe Size 10-13, Youth/Little League Shoe Sizes 13-4, Juniors Shoe Sizes 4-8, Adult Shoe Sizes 8-12 Used by Youth & Adult Players in Little League, Pony, Travel, School & Rec. Leagues.