Amazon.com : DIY Medicine Ball Shell for Strength Training, Soft Leather Weighted Slam Wall Ball Cover for Body Workout with Different Sizes, DIY Hand Exercise Balls for Home Gym (Diameter 11.8''-Gold) :
Ball Cover - Etsy
Medicine Ball Cover at RX Smart Gear
CIPA Trailer Hitch Ball Covers | RealTruck
Ravelry: Yoga Ball Cover pattern by LeRoo Crochet
55cm Balance Ball / Yoga Ball Cover: Coral – Global Groove Life
Ball Cover – Golf Term
75cm Balance Ball / Yoga Ball Cover: Black & Grey Palm Leaf – Global Groove Life