‎25.59 x 25.59 x 25.59 inches

Make sure this fits by entering your model number.
1.XGYLVFEISIZE DIFFERENCE: minimum desk height of 26″ is required for the size. Measure your desk before purchasing! It is the Original Active Sitting Ball Chair Solution for use at the office, home in the living room, classroom, or the gym. Suburb complimentary ergonomic alternative sitting stool solution for desk sitting and standing desk
2.XGYLVFEIPosture & Health: Activates back and core support muscles which promotes good posture and can potentially relieve back pain for Adults and children. Comfortable substitute for pregnancy birthing ball, labor ball, or Medicine ball