A standard sofa typically consists of a rectangular or curved seat with a backrest and armrests on either side. The seat may be upholstered in fabric, leather, or synthetic material and filled with foam or other cushioning materials to provide comfort. The frame of the sofa is usually made of wood , and the legs may be either visible or plastic Leg. Standard sofas come in a variety of sizes to fit different spaces, ranging from small two-seaters to larger sectionals. Some standard sofas may also include additional features such as reclining seats or convertible designs that can be transformed into a bed