YOYO Water Ball, TPR Soft Ball, Sticky Ball: Material is soft TPR Diameter is 4.5cm, 5.5cm, 6.5cm. YOYO Water Ball, TPR Soft Ball, Sticky Ball:Size ... : Dia. Approx 5-5.5cm for the ball, cord longness is 3 inch ... . Material: Non-toxic TPR, have jelly or pure water inside the ball Feature: Squeeze it, Fling it, Throw it, Bounce it ...