Durable polyester bags are ideal for carrying and identifying practice balls or other equipment. Cord closure with convenient slide lock. Small holds 12 tennis balls; Medium holds 4 volleyballs or 2 basketballs; Large holds 10 volleyballs or 6 basketballs; X-Large holds 16 volleyballs or 10 basketballs; XX-Large holds 23 volleyballs or 16 basketballs. Set of 6 includes 1 of each Rainbow® color; also available individually in Red, Blue, or Black.