When he finished it, he slapped it in a store bought frame and used the mat it came with. I had to have an intervention. The mat was just not happening. It was too large and came right to the edges of his drawing. He brought it over here and I cut a double mat for it. Much better! A mat cutter is a great thing to invest it, or even better, have your sister buy one and do it for you. :) But seriously, when I was in school I had to mat a lot of my work and it was outrageously expensive. I have had my mat cutter for about 10 years and I have gotten so much use out of it. One large sheet of mat board costs $5 and can be cut into 4-6 mats!