A flat sheet is a large, rectangular piece of fabric used in bedding, typically placed over the mattress for comfort and hygiene. Unlike fitted sheets, which have elastic corners to hug the edges of the mattress, flat sheets are not designed to conform to the bed’s shape. Instead, they are laid over the top of the bed and tucked in at the sides and bottom to create a smooth and neat a... https://britdecor.uk/collections/flat-sheets