This Rio Black moulding is 18mm wide by 25mm deep and is made from high quality wrapped MDF sourced from sustainable forestation. The frame is manufactured to the highest quality in our UK factory and is modern and elegant in design. The frame comes complete with glass and an MDF backing board and styrene instead of glass. On receiving please remove the protective film from BOTH sides of the styrene. The protective film is left on the styrene during manufacture to keep it dust, fingerprint and scratch free, once the film is removed the styrene will be in perfect condition and ready for use. The styrene looks no different from glass but is a safer option for shipping and once hung. The size shown is the styrene/picture size NOT the overall frame size and is shown in inches. The frame comes with screw eyes which easily screw into the wood frame enabling the frame to be hung either portrait or landscape. Each frame is individually shrink wrapped to ensure it arrives in perfect condition. If you have any technical questions regarding this frame please contact the manufacturer, Frames by Post Ltd, Customer Services on 0845 533 262.