Choose from 4 x 6" with 2.5 x 3.5" opening, 5 x 7" outer size with an opening for a 3 x 5" or 8 x 10" outer size with a opening for a 5 x 7" opening Color ranges that available are: Neutrals, Blues + Greens, Warm colors, Fall colors, Cool Colors, Black & Whites This conservation quality matting is made from name brand companies - Bainbridge, Crescent and Artique. Fabric Mats are also available for a small additional charge if you prefer. If you would like a different size let me know. I can adjust to your specifications and give you a quote. Also if you have a color range such as all blues & greens, etc. let me know. Matting 6 Mats Photo / Art Archival Matting Fancy Corners Acid Free Mat board Color Range or Variety Choose Sizes Custom Also Available RETURN POLICY All are mats are individually custom cut "one by one" for your order specifically. We do not stock them already cut . For that reason they cannot be returned but if you have a problem please contact us and we will see what we can do to resolve your problem.