I've seen a lot of stickers for MacBooks, but the ones from Vinylville, available on Etsy, are fantastic. See this one, from Snow White:
Or this other one, from Invaderz:
The creator, Viee, an American designer specializing in creating images with vinyl. Beautiful work, and at a very affordable price: on average, each sticker costs US $ 14. And you have many more options beyond those two, be sure to check it out.
(Tip from Bruno Santos, thanks!)
