I'm so happy that I found this site, which made tracking down a frame and a custom mat simple and easy. Here's one of my large prints in a 12x12 frame with a 12x12 single conservation mat. I measured my print to see how much of the black edging I wanted to show. The mat pictured above has a 7 1/4 inch square opening. If you're like me, and you keep lovely prints in a pile called "frame someday", you'll want to click over and have these people deliver exactly what you need, right to your door.