This is a set of two balance cushions (balance discs). The color is blue. They have been used. There are scratches, dullness, and stains overall. They have been cleaned with detergent and wiped with disinfectant wipes, but some stains remain. The diameter is approximately 30cm and the height is approximately 11cm. I believe you cannot inflate them from the valve. Please refer to the photos for the condition and size. I would like to request that those who understand that these are used items purchase them. Thank you.