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. The image opening has a beveled edge. Details:Available in a variety of colorsRecycled white core18" x 24" mat fits 12" x 18" photoSingle matAcid free