MD Rage Balls are the highest quality medicine balls on the market for the most economical price. Each weight is the same size, 45" in circumference. Allowing the athlete to increase the weight without changing their movement. Our med balls have a more "solid" feel compared to other balls on the market.- Made in the USA- 2 year full guarantee- If this product does not meet or exceed your expectations we will take it back and issue a full refund, including all shipping costs.