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) :
Yoga Ball Cover, Sitting Balls Cover, Anti Burst Foldable Storage Bag Anti Scratch Fitness Ball Exercise Ball Cover Protective Ball Cover 65cm - Walmart.com
Black Ball Cover for 1 7/8" and 2" Hitch Balls-22203
Amazon.com: Howdy Bally Protective Ball Cover for Home-Use Yoga/Exercise/Balance Ball with Convenient Carry Handles, Foldable Durable Anti-Burst Ball Cover for Sitting Ball Chair Office Use 55cm : Sports & Outdoors
75cm Balance Ball / Yoga Ball Cover: Black & Grey Palm Leaf – Global Groove Life