This is something I received in the past. It is new and unused, and only the box has been opened, but the inner bag has not been opened. The size feels like a double size. It is often used as a "flat sheet for a double bed (the type you lay on top)" or as a size that allows for ample tucking around the mattress. ● Item Christain Koban Bedding, Futon, Sheet, Cover Towel Sheet Box, Mattress Made in Japan ● Size 150cm x 250cm ● Color White ● Material 100% Cotton