SIE: Self-made envelopes & profile based surprises

You will make 5 envelopes for your partner.
For size I suggest about C6 (114 x 162 mm) or DL (110 x 220 mm) as this should be able to send as "regular" letter in every country. Similar size is ok, too.
Any paper is acceptable (maps, calendars, magazines, scrapbook paper, etc.) as long as it is sturdy enough.
Make them nice and decorate if needed. Try to vary the patterns/colors.
Lining of the envelopes and double sided tape on the flaps is optional.
Store-bought envelopes that are decorated by yourself are NOT acceptable.

In each envelope you will put a profile based flat surprise (postcard, used postage stamps, notecard, sticker sheet, sticky notes...) DON'T seal up these envelopes as your swap partner should be able to use them ;-)

Then put everything in an envelope, add a short message with the swap name and your username.