During potty training, when I was worried about bedwetting, I used to put these on over my child's pants while they slept. It was great because even if they wet the bed, the futon wouldn't get wet. The button that fastens between the legs has come off and is attached to one side. I only used these for one season during potty training. I would appreciate it if you understand that these are used. I don't know the size, but the length, etc. is shown in the photos. I am also selling these on other sites, and I will delete this listing if they sell out. I am also selling various other items. If you purchase multiple items together, I can offer a small discount. (Discounts are only available for items that can be shipped together)