You will get two picture mats cut for 11x14 pictures. They will fit into any 16x20 frames. The opening is cut to 10.5 x 13.5 to overlap a 11x14 picture. The overlap also helps to mount pictures to the back. These mats are acid free and cut from 4 ply mat board. All of our matting is cut from high quality 4 ply acid free mat board. Each mat is precision cut with beveled edges that show off the beautiful white core of the mat board.