Ten Single Mats With Acid Free Backing Boards And Crystal Clear Self Seal Bags, Featuring A Picture Opening For A 8.5X11 Inch Photo, To Fit In A 11X17 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 8.5X11 Photo And Fit In A Standard 11X17 Picture Frame. Vibrant Brick Red 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.