Google is your friend...

Sticker
A sticker is a type of a piece of paper or plastic, adhesive, sticky on
one side, and usually with a design on the other.

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Then I tried "sticker wood" and got this and the like:

http://www.ebay.com/sch/items/?_nkw=...w=&_mPrRngCbx=
1&_udlo=&_udhi=&_sop=12&_fpos=&_fspt=1&_sadis=&LH_ CAds=

There comes a point where the flaming of "Don't you use Google?" is worth
it...