There are many pre-cut mats on the market. Their opening sizes include 4”x6”, 5”x7”, 8”x10”, 11”x14”, 12”x16”, 16”x20”, 18”x24”, and 20”x24”. Three most popular colors are black, white, and ivory. They are neutral colors Pre-cut mats are relatively cheap since they are mass-produced. They are convenient since it takes only a few minutes to mount…