I'm really not sure what you're talking about or what the relevance of the photo is.
If you're talking of fitting Sei Abarth wheels (IMHO not a great choice as they're only 5.5J and tyres are bloody expensive) you need 10mm hubcentric spacers at the front only. So -- miracle of miracles -- you need 10mm longer wheelnuts (which should have a suitable taper for the Abarth wheels). On the back -- presuming alloys -- they'll be the same length.
But wheelbolts are for monkeys: get a stud conversion.
If you just want to fit centre caps, measure the ones you have and get the same size!