I can't take credit for this but it sure is a great idea!! It was actually Sherri's idea and I ran with it. I have three old calendars and I just started making envelopes like crazy! It was really fun to see how each one turned out. I made a liner to go inside them since I write on my calendars. If you have yours left from last year I encourage you to give it a try!!! If you need a template just get a store bought envelope and carefully undo it then trace it onto cardboard and you have your pattern. I took my pattern and traced it onto velum so that I could see through it and know where to place it on the calendar. Then traced and cut!!!