Along the lines of the Repurposed CD Jackets, I rarely threw away my Anthropologie or Free People catalogues. They were just too pretty. Ethereal.
Well, a few years later, and I had a stack of 'pretty' catalogues that I had moved to a new apartment. Instead of looking through and sighing at the dream-like pictures, I instead started ripping out the pages. Some I made into wrapping paper (future feature), and some I made into envelopes for letters, small gifts and my cards.
Envelopes are not hard. At least, these aren't hard. Instructions follow below.
Step 1: Look at your magazine. Open up to the center where you can see the crossed staple legs. Pull the staples out. Cut along the crease for the pages you think would make good semi-regular size envelopes, and you feel the picture can be cut in half. Leave the crease uncut if you like one of the full length pictures.
Step 2: Fold your magazine page almost in half, but leave 1 to 1.5 inches of single thickness opposite the fold.
Step 3: Fold the single thickness down to form a top flap for your envelope.
Step 4: Flatten your top flap open. Fold the sides in. Depending on what size you want your envelope, or how much of the picture you want to maintain, gauge your fold. I folded mine in about an inch on both sides.
Step 4: There will now be a square on each corner of the single thickness top-flap. These squares need to be cut off.
Step 5: Tape the sides down. I'm cheap, so I cut the tape in half along the long edge, and use each half to hold one side down. I also think this looks better (less handmade). Viola! You've got an envelope! When you use it, be sure to glue or tape down the top flap.
For large envelopes: Take the two pages (still separated by the crease), and re-fold along the crease. Fold the double thickness in (opposite the side of the crease). Tape with translucent tape. Fold up bottom. Crease the top as large as you want your flaphole. You could leave like this, and just tape the double thickness of top-flap down after the envelope has been stuffed, but I would prefer to cut the flap to single thickness.