Crescent Creative Products SPB221-0912 40 Count Smooth Black Cream Core Bulk Pack Mat Board, 9" by 12" 9" X 12" school packs (40 count) make it easy to stock up and save Perfect for presentations, mixed media, collage, mounting art, and other projects Smooth Black surface with Cream core, buffered acid-free Sturdy, Medium weight boards (0.050" - 0.060" thick) Made in the U.S.A