This kind of ball is used in the sports water polo and canoe polo. It is known for its typically yellow colour and good grip, so that it can be held with one hand even though it's quite big. After much use the ball loses its grip or punctures at one of the seams and becomes unusable for match play. Balls come in two main sizes, a size 5 used by men and a size 4 used by women. Smaller balls are sometimes used by juniors for 'mini-polo' though these don't have a standard size and are often green.
Waterpolo ball brands
