This item was given to me in the past. It's new and unused, with only the box opened, but the contents inside the bag have not been opened. The size feels like a double. It's often used as a "flat sheet for a double bed (the type you put on top)" or a size that allows for tucking in around a mattress. ● Item Christain Koban Christian Koban Bedding, Futon, Sheets, Cover Towel Sheet Box, Mattress Made in Japan ● Size 150cm x 250cm ● Color White ● Material 100% Cotton