moderator's note: image link broken, see below for new link Thought some of you might find this useful. Just the ideal size for those seeds you'll collect and it's free!!! All you need is a Pritt stick and a pen. Thanks to Scotia.
Hi there, A Pritt stick is just a simple glue stick edrny - sorry obviously a British make. Welcome to GardenStew btw.
I don't have my picture any more but here's a site that has a seed envelope template: http://tomclothier.hort.net/templat2.htm
I have used one similar to this one..... http://tomclothier.hort.net/template.htm I printed one of my garden photos on the paper then drew the template around it. You can either glue or tape the flaps.