WELLAND U Shape Display Shelf Set 3 Black Set of 3 "U" wall shelves offer a unique beautiful design. They can be hung upside down, looks stylish They are made of MDF laminate and are quite sturdy and durable Great shelves that give your decoration a luxurious and elegant accent, decorative and functional They do appear as if they are floating with the concealed mounting hardware. Easy to install in 15 minutes. Hardware included They come in 3 approximate sizes-- Large: 18 x 4 x 4". Medium: 14 x 4 x 3". Small: 10 x 4 x 2