Naked sticker sheet 'postcard'

Inspired by a discussion in forums - does a sticker sheet count as a postcard? Well, let's make it count!

Take a postcard-sized sticker sheet, adhere it to a cardboard or postcard blank for sturdiness, add a postmark and send it naked through mail.

Please note: you will not stick the stickers themselves to cardboard, only the sheet the stickers are on, so that the stickers would still be usable. Do not put the sheet in a transparent sleeve or envelope - the idea is that stickers must brave the postal system! Of course, if some of them do get lost, don't rate your partner down for it (but don't send a half-used sticker sheet and claim the post must have swallowed the rest, either). A traditional size for postcards is 10x15 cm or 4x6 inch, but if you don't have such a size available, you are welcome to use another size that would still be sendable as a postcard.

No unexplained 1s or 3s, no double profiles, underage swappers, flakers or non-raters, please. Newbies with filled profiles are welcome.

Don't forget to write the swap name and your username on your postcard. Any other message is up to you. Sticker sheet itself is sender's choice, too - I suspect that 3D stickers would not be the best choice for this swap, though.