Golden State Art, Smartphone Instagram Frame Collection, 12x12-inch Square Photo Wood Frames with Photo Mat & Real Glass for 8x8-inch Pictures, Black New Black Square Photo Wood Frame. Overall Frame size: 13 x 13 inches. Includes a Single White mat with Opening Size: 7.5 x 7.5 inches Can fit Pictures: 12x12 (without Mat) Or 8x8 (with Mat) Mat is Bevel cut mat with white core and 4-ply thick (about 1.4 mm or 1/16 inch). Frame border is 1'' wide and 0.75'' thick moulding. Includes 1 Hanger for hanging options. Contains Real Glass.