Color Class Ball. P.G. Softs are roto-molded from foamed vinyl and combine the best features of traditional rubber playground balls and coated foam balls. They are supple, squeezable, sting free and bounce like a rubber ball. Each ball's diameter can be varied by an inch or two to find the desired softness and bounce. Each set includes 1 of each color: Blue, Green, Orange, Purple, Red and Yellow. Inflate to desired softness and bounce, 3.5" diameter "Softball".