Made by Soft Prene Kogyo Co., Ltd., this is a sponge cushion. It's used by placing your head in the center hole when you lie face down on a desk. Instead of putting your head directly on the desk, using this pillow will improve the efficiency of your naps. I used to use it, but I'm not using it anymore, so I'm putting it up for sale. The size is small. Outer width: 25cm Inner width (longest part): 10cm Outer length: 24.5cm Thickness: 7cm