8" X 10" Matted To 4" X 6" Thin Gallery Image Frame Beveled Mat Black - Threshold™ : Target
Picture Framing Mat Black With Gold Liner 11x14 for 8x10 Photo or Art Rectangle Cutout - Etsy
How to make your own photo mats — Interiors By Sarah Langtry
Matting: Why It Matters- American Frame
Matting and Framing | New York State Archives
Picture Framing tip - Choose a Double Mat - MatShop Art Supplies
Amazon.com - Giftgarden Multi Black Picture Frames with Mat for Multiple Sizes Photos, Four 4x6, Four 5x7, Two 8x10 for Gallery Photo Frame Collage Wall or Tabletop Display, Assortment Pack of 10