Then I thought envelopes! Perfect! But then I quickly realized that if I wanted envelopes that snugly fit the tags, I would have to make them myself. A pencil, scale ruler, scissors, a plate and some graph paper later, I came up with this:
I used items I had on hand. Old book pages, security envelopes, ribbon and paper scraps. I got the shipping tags in a pack of 100 from Staples. You could probably find them at any office supply store.
I found that it was best to use double-sided roll-on adhesive. That way, the paper won't pucker and everything will lie flat and pretty.
I spent much time designing an envelope for these cards, but you don't have to! Download my free template with instructions here. It should print out the right size, but just in case, the paper is 1/4" scale, so get out your ruler to make sure!