PA Double Framing Mats let you turn your photos and artwork into dramatic and exciting home decor pieces that can be hung on your walls, displayed on an easel, or even decoratively framed. Double layer mat with both layers having beveled edges. 12"x 16" /9"x 12" White Core SoftWhite/SoftWhite- Sizes refer to exterior dimension and photo or art size, with inside edge overlapping some of image. Actual inside measurements approximately 8.5"x 11.5". SoftWhite upper mat with soft white inner mat, both with white core bevels. Acid free but for Non-Conservation Framing.