I have for sale some MG Xpower and MG window stickers. These stick to the INSIDE of your window.
You can get a rough idea of the size by the pictures.
I have a pair of black MG Xpower ones and a pair of silver MG Xpower stickers (£5.50 a pair inc postage):
Also have a large silver MG sticker (£4.50 inc postage):
Regards
Matthew