From the Google Blog page
Google is giving away some cool stickers for Christmas…
There’s a glitterized Gmail m-velope, some bookplate style stickers and there’s a sheet of keyboard shortcut stickers intended as a tool to help people learn Gmail’s shortcuts.
So how do you get your stickers? Just send a self-addressed stamped envelope to:
Send me some Gmail stickers already
P.O. Box 391420
Mountain View, CA 94039-1420
Make sure to include enough postage to return a sticker pack via U.S. mail. It’s less than one ounce, so a standard $0.42 stamp will do if you’re in the United States; enclose an international reply coupon (IRC) if you’re outside of the U.S. And be sure to send your envelope in soon — one per person please.