Medicine balls are a versatile and timeless fitness accessory. They can be used with many different exercises to work out the arms, legs and core. The Modern Movement 6.6 lb. (3kg) ball is about 8" in diameter (200mm), bright orange and has a textured rubber surface that is easy to grip. The ball can be thrown between partners, or bounced off the floor or wall. The Modern Movement 3kg ball has a heavier wall thickness than most other Medicine Balls of this weight, which can provide greater durability.