I've been using three waterproof sheets, rotating them for about a year and a half. This is one of them. It shows signs of use. Roughly measured, it's about 70cm x 117cm. It's the type that's laid horizontally at the waist, so it doesn't have any elastic. I initially used disposable paper sheets, but they tore quickly because I tossed and turned a lot, so I started using cloth waterproof sheets. If you have a large amount of urine, I recommend putting a disposable paper sheet underneath. For normal leaks, this one sheet should be sufficient. I think these kinds of items are essential for nursing care. Buying them new can be quite expensive, so using used ones with a disposable mindset might be an option. If you don't mind used items, how about it? It might also be good for pets.