Size Matters
Mattress thickness matters in a daybed, with 8 inches being a customary choice. Anything thicker creates a potentially uncomfortable height when the bed is used for seating during the day. It also could obscure the bed frame, which is generally considered an important piece of decor in the room. Although daybeds are designed to use twin- or full-size mattresses, the fit is typically not a snug one. Because the frame of a traditional daybed covers three sides of the mattress, room is needed for bedding that would ordinarily hang free on a standard bed. Backless daybed designs eliminate some of this concern.