Waterproof Sheet - Single Size: 210cm x 98cm *Not completely waterproof!!* I used this for about 3 years under my daughter's bedding. The surface shows signs of use. It's not completely waterproof, as the futon underneath got a little damp a few times when she wet the bed. I hope you can use it with the mindset that it's more of a safeguard. It's a single size, but slightly smaller. The color is light blue.