A SHELF is a flat, horizontal surface used for storing items. It is typically made of wood or metal and can be attached to a wall or stand alone. An ETAGERE is a type of SHELF that is usually taller and more decorative than a regular SHELF. It typically has several shelves and is often made of wood or metal with ornamental details. A place for knickknacks is a storage area, such as a SHELF or ETAGERE, that is used to display small decorative items.