If you plan on mailing any personal letters out anytime soon try making your own envelop to put the card in.  It’s fairly simple and you can use just about any type of paper you want (magazine pages, newspaper, ect.) Just take a blank envelope and unfold it, then trace the envelope onto the paper that you wish to make the new envelope out of.  Then cut out the tracing and carefully fold and past the envelope in the same places the original envelope was folded and glued.  And there you have it a personalized one of a kind envelop to send your letter in. 

Below are some pics of DIY envelopes I found that other people have done :)