Free Envelope Templates (C6, C7, C8) String-tie & standard designs I think the string tie ones would be adorable if we printed something like "Thanks for being a part of our big day" and kept tips inside for each of the vendors.
The Non Slip Loop Knot. Superb. The strongest loop knot you can tie. Used by big game anglers worldwide. Easy to tie, far stronger and more reliable than the old fashioned strangulating figure eight knot that can substantially weaken line.