Pictures and art frames are borders on images that exhibit, protect, complement or enhance the portraits. Homeowners have a wide range of wall frames to choose from, including wood, plastic, silver, aluminium and bronze. The frames are also available in different shapes such as rectangular, circular and elliptical. Some of the things you can frame are artworks, photographs, mirrors and special documents such as certificates. Frames come in different sizes, such as large wall frames covering an entire wall section or small variants the size of a matchbox.