I cut mine small (1x1 inch) since I like them better but I wait to mat until I'm doing a layout - that way, I can change the mat depending on what I'm doing for background paper - the neat thing is it changes the look every time I change the mat paper.

I also saw someone use sticker letters on them (can't remember if it was here or not) but they came out so cool and would look great on a back to school page! :)