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:White 16" x 20" matted to 12" x 18" (40.6cm x 50.8cm matted to 30.4cm x 45.7cm)Single matAcid free