Matboard can be used for matting photos, art, and needlepoint. Also it is great for crafts, backboards, signs, children's projects, and school projects. These are acid free matboards. Thickness Range: 1.0mm to 3. 0mm Popular Thickness: 1. 2mm, 1. 4mm, 1. 6mm Core: cream, white, black Pre-cut Matboard: 5"x7", 8"x10", 9"x12", 11"x14", 12"x16", 14"x18", 16"x20", 18"x24", 20"x24", 22"x28", 24"x30" Matboard in sheets: 32" x 40" 32" x 44" 32" x 47" 40" x 60"