Toysmith Peace IsoFlex Stress Balls Party Set Bundle - 4 Pack (Assorted Colors) Bundle Includes 4 Assorted Peace IsoFlex Stress Balls! (Colors are Assorted and May Vary) Each ball measures 2-1/4" & is double lined for durability. Doctor recommended, squeeze and feel good! Helps relieve stress, pain and stiffness in the hand while enhancing flexibility and strength! Makes a great gift & is perfect for schools, party favors, stocking stuffers, baskets, special needs, stress relief and so much more! For Ages 8 and up - Perfect for the whole family!