I've been storing this at home, but I'm selling it because I don't plan to use it. The size is 55 centimeters. It comes with a plug, an air pump, and a Japanese instruction manual. You can use it right away. I inflated it to check, and there were no holes. There are creases from being folded for storage. Please refer to the images. Although it has not been used, it is a used item that has been stored at home. Please understand this before purchasing. - Color: Blue - Accessories: Pump - Product Name: Balance Ball - Instruction Manual: Japanese instruction manual included