I'm a bit confused on how to measure the centercap BMW emblem on my X3.

OEM part numbers:

For the "hub cap with clipped-on plaque" = 36136768640

For the "BMW insignia stamped/painted" = 36136767547

Part numbers are from here: http://www.realoem.com/bmw/showparts...11&hg=36&fg=15

I'd like to possibly change them so I'm trying to figure out the size. If anyone knows what size will fit (65, 68 or 70mm), let me know.

Thanks.