AUEAR 15 Pack Acid-Free 8x8 White Photo Frame Mats with White Core Bevel Cut for 4x4 Pictures/Artworks

8x8 Picture Mats: Photo mats size 8x8 inch with opening size 3.5x3.5 inches for 4x4 inches pictures Acid Free: Long life, long-term decorate your frame and picture, can keep your precious memories fresh as the day you take it Bevel Cut: White core bevel cut for 4x4 pictures, 4-ply thick (about 1.4 mm or 1/16 inch) Great decoration for your frames and photos, pictures and prints, can display your favorite piece of art What You Get: This item comes with 15 8x8 single mats, backing board is NOT included