Mat board is all conservation quality acid and lignin free and you will receive a variety of colors. Shades of color will vary from those shown in picture. The mats have uncut centers. Fabrics consist of mostly linen, possibly some silk & denim This is all name brand 4 ply matting - either Crescent or Bainbridge. Custom sizes are also available that are not listed here These mats can be cut with a beveled opening for an additional charge. Just let me know what you want and I will get back to you with a quote. RETURN POLICY Custom quantity, color and sizes also available. Let us know what you are looking for and we will give you a quote. Fabric Mat Board Matting Blanks for Picture Framing for Art, Photos, Crafts 6 Pieces Color Variety Archival Matboard Choice of Matte Size