Our Nobbie Football provide a tactile experience; especially for adapted PE students. The nobs make these footballs easy to grip, catch and hold. The material is Very flexible when properly inflated and easily squeezed even by little hands. Lightweight, so they travel more slowly through the air. Inflate as you would a playground ball. Each Nobbie Football is 9" long with a 5-3/4" inch diameter. 6-Color set includes one each of the following: Red, orange, yellow, green, blue and purple. Shipped Deflated.