SIZE OF FRAME This 12x16 frame made to display 11 x 14 photo with mat or 12 by 16 picture/document without mat. The actual opening size of mat is about 10.31x13.3 inches. A piece of frame mat is affiliated to every picture frame, which meets your needs. HIGH-QUALITY MATERIALS This frame is made of wood(wood grain paper wrapping), that is different from the one made of PS or MDF. It's more durable and free from the change of humidity and temperature.Therefore, not easily deformed. HD plexiglass(Plastic) cover instead of glass, a safe option for people with children as you do not have to worry about glass getting broken(There are protective films on both sides of the HD plexiglass front, please ensure remove the protective films before using.) VERTICAL & HORIZONTAL DISPLAY Coming with hanging hardware supports both vertical and horizontal wall display(Hooks position can be adjusted freely).12 x 16 frames come with easy opening tabs at the back for easy access for loading photos.