Since they are 12" long I used a double z-fold to close them to fit in a standard card envelope. Here is a top view so you can see the fold a little better. The card is scored and folded every 2" (except in the middle- skip that 2" mark).
Isn't it adorable folded up too? It is just like a circus tent that opens right up! I love that the tent was symmetrical so I was able to design it to do that :) Oh, just ignore my fingers in the photo- I had to make sure it stayed shut nice and tight so you could see it good in the picture ;)
And then I actually used one of the clear envelopes to mail them- I mean, who would want to hide all that cuteness :) Did you know that you can mail cards in those? If not, now you do! The only trick is that you want to use the back side (i.e. the plain white side) as the side of the envelope you put mailing labels and stamps on.
Hope you enjoyed today's inspiration. Flutterby again soon!