PA 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. Single layer mat with beveled inner edge. White Core 12"x 16" /8"x 12" Bottle Blue- Sizes indicate exterior dimension and photo or art size with inside edge overlapping some of image. Actual inside measurements 7.5"x 11.5". Bottle blue, similar to dark blue, surface with white core bevel. Acid free but for Non-Conservation Framing.