20x24 Picture Frame w/ MAT (Wood) Set of 6 20x24 Picture Frame w/ MAT (Wood) Set of 6 This item comes with 6 20x24 picture frames per order The mat size is 20x24 for 16x20 photo and the actual opening is 15.5x19.5 The mats are beveled cut with white core and 4-ply thick (about 1.4 mm or 1/16 inch). 1'' wide and 3/4'' thick molding