12x12 Premium Matboard with White Core Bevel Cut for 8x8 ImageThis listing is for a premium grade single 12x12 matboard, cut for a standard image size of 8x8 (opening of 7. 5x7. 5). Some of our product highlights include: Premium Pure White CoreIndividually Cut 45 Degree Beveled Inner Edge For An Art Gallery Like Finish4 Ply Matboard (~0. 05" Thick)Made In The USA We offer a variety of colors and sizes, and you can choose your own opening size for your art or photos, just reach out to us for custom opening