This Is For One Single Mat Only W/O A Backing Board Or Bag, Featuring A Picture Opening For A 12X12 Inch Photo, And A 16X16 Inch Overall Size. Picture Openings Are Cut 0.5" Smaller Than The Photo Size Advertised To Overlap The Photo And Help Keep It Securely In The Frame. Made To Display A 12X12 Photo And Fit In A Standard 16X16 Picture Frame. Great Replacement For Damaged, Dirty, Or Faded Matting In Your Old Frames. Premium Quality: Our Precut Photo Matboards Are Acid Free & Precision Cut With A 45 Degree Bevel By Machine For Perfect Corners And No Over-Cuts Every Single Time! Precut Acid-Free Matte Board Color Is A Vibrant Textured Cream. All Of Our Precut Matboards Are Proudly Manufactured In The Usa.