This is a thick, single-size waterproof sheet. The size is approximately 100x210cm. I bought it for my child's potty training, but they never had any accidents and I only used it a few times. Although there were no accidents, I did use it under the sheet, so please understand that this is a used item. One side is cotton and can be machine washed. It's great for bedwetting, and it's also reassuring to have one on hand for the upcoming norovirus season. It will be sent in simple packaging via Yu-Packet Post with compensation.