bintiva Adjustable Balance Board, Extra Wide Diameter, for Fitness, Balance, and Stability Training The height of the wobble board can be adjusted to 3 different levels with the included adaptor. Balance board has a textured non-slip surface for increased safety. Large 15.75 inch / 40 cm surface makes it ideal for a variety of uses. Recommended by physical therapists, and other health, and fitness professionals, for exercise, therapy, rehabilitation, and for use at a standing desk. The balance board is recommended for users up to 180 LBs.