I also purchased mine from him. Shipping took a little while but made it safe and sound. There really is not a direct replacement size because you are going from an oval to a circle but they are the standard size used in Europe. They do not have the centering pins so you need to line them up yourself once you get your mercury logo off. You also have to stip off the tape residue left over. This is also the same size that you want if you get the european ford grill insert and want to use a black badge instead of the stock blue like I did.
