topseller100, Pack of 50 sheets 11x14 UNCUT matboard / mat boards (Mix) 50 sheets 11x14 UNCUT mat boards / matboards This package comes with 50 uncut white core matboards Great for cutting your own mats for photos, art works, or prints Outside Dimensions: 11x14"; Perfect for framing photos in an 11x14 picture frame. These are Acid Free matboards, Standard 4 ply: 1.4 mil or 1/16 inch.