Balance dome, perfect for balance training and to address lack of exercise, available in blue and gray, with diameters of 46cm and 58cm. If you would like the larger size, please specify in the comments section. This link is for the 46cm size only. - Colors: Blue, Gray - Sizes: Diameter 46/58cm - Uses: Balance training, addressing lack of exercise - Features: For children, posture improvement Thank you for viewing.