The 21 x 14 cm plates are bike-sized, even the DIV says so. US-sized plates are 12 x 6 inches, which is about 30 x 15 cm, with specific mounting holes 7 inches apart. I guess our bike plates can fit the mounting holes of US-spec cars, but my gripe is about the DIV who thought enough about the NATO/SHAPE population to allocate the whole of the 8-***-*** plates, but failed to notice that the NATO/SHAPE population often drives North American spec vehicles.

And introducing US-sized plates wouldn't have been a big problem, since our (rear) belgian plates are now made by the same company who also provides plates of all sizes, including 30 x 15, for Germany, Holland, etc.