Frame your cherished photograph yourself using a ready-made frame and this pre-cut photo mat. The mat adds a layer of air between your photo and the glass to keep the photo from sticking due to humidity and age, while the acid-free properties of the mat will not yellow or destroy the photo over time. This mat is cut at an angle so that the inner edge of the matting shows. Details:16" x 20" mat with 10" x 13" openingRecycled white coreSingle matAcid free