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 deskActivates 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 ballPerfect for ab engagement, yoga, back stretching, posture workouts, therapy, and physioball balance training routines, also promotes flexible joints for healthy lifestyle.Before inflating, please open the zipper and leave a 3cm hole for inflation. Please install and use the zipper in accordance with the products main picture, video and instructions. Please increase the strength and inflate the inner ball to make it large enough.Because of the photography and the monitor reason, cannot accept the chromatic aberration the buyer please discretely to purchase, thank the cooperation. Our products are made with the splendid quality materials and are designed to provide you with the best possible user experience.