Matting fits an 18x24 frame (frame not included) The opening is designed to display a 14x20 inch photo or print. To ensure the photo does not fall through, the actual opening size is 13.5x19.5 inches Matting is Buff White with a smooth finish and a light cream core pH neutral maintains a professional appearance Listing includes one custom-cut, single-opening mat Showcase your cherished moments with this Buff White matting. Our signature smooth mat showcases a custom bevel-cut opening with a 0.05 inch thick cream core. The actual opening size will be reduced by 0.25 inch on all sides to prevent the image from falling through the opening. To attach your print to the matboard, center the image within the mat opening and secure on the top side with an adhesive strip. Our pH neutral matboard maintains a professional appearance. For superior quality, this single-display matting is manufactured in the U.S.A.