One Single Mat With Acid Free Backing Boards And Crystal Clear Self Seal Bag, Featuring A Picture Opening For A 5.5X8.5 Inch Photo, To Fit In A 7X11 Inch Picture Frame. Photo Openings Are Beveled Cut 0.5" Smaller Than The Art Size Advertised To Overlap The Photo And Help Keep It Securely In The Frame. Made To Display A 5.5X8.5 Photo And Fit In A Standard 7X11 Picture Frame. Vibrant Black With Black Core Color Acid Free Picture Matting. 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, Professionally Bevel Cut Matte Board. Custom Frame Shop And Archival Quality. All Of Our Precut Matboards Are Proudly Manufactured In The Usa.