Thank you.

25mm = .98 inches (just about an inch)
and 21mm = .83 inches (a hair under 7/8 inch)

What a surprise - looks like where it was to start with was way too high, but I got used to it there and thought it was in the right place.

The new placement is about 1.25" from the left (about 1/4" too far)
and about 1" up (about 1/6" too high).

I'd have to say that that should be close enough not to rip off the plate, killing the paint in the process, and having to buy a new plate.

But it does look wrong being so close (only about 3/8") from the end of the chrome strip that runs along the center edge at the bottom of the trunk.

Thanks for your help.