100 pieces; Diameter: 2.2 inches (5.5 cm); Made of soft polyethylene; (for pool/ball pool/ball house); This color ball is perfect for childrens pools and ball houses. 7 colorful colors that kids will love! (Red, yellow, blue, green, orange, pink, purple) Made to be safe to float in a pool of water. The material is made of safe polyethylene, so your child can play with it with confidence.