At ClearBags, our wholesale Crescent mat boards are top notch. See our 11" x 14" single mat boards, double thick, white, with a white core and 8 x 10 cut.
Golden State Art,11x14 Pre-cut Double Mat with Whitecore fits 8x10 Picture
8x10 Frame + Double Mat – Matboarddotcom
Pack of 25, 8x10 Pre-cut Double Mat with Whitecore fits 5x7 Picture + Backing + Bags.
Ambiance Conservation Quality Pre-Cut Mat Packs
8x10 Frame + Double Mat – Matboarddotcom
Lightweight Single Weight Matboard, Mount Photos
11x14 Black Photo Mat for 8x10 Picture 4 Ply Thickness Acid-free Bevel Cut
Golden State Art, Pack of 10, 11x14 for 8x10 Color Picture Photo Mat -White- core, Acid-Free - Great for Frames, Artwork, Prints, Pictures, White
Mat Board Center, Pack of 10 11x14 White Picture Mats with White Core – DirectNine - Europe