Wheel trim sizes. I'm confused

[goddardo]

I'm needing a new set of wheeltrims for my Citroen Xantia.
The confusion comes when I see trims advertised for Xantias in both 14 & 15". Also, my tyres are R15 which I presume means 15", but I read somewhere that 15" tyres need 14" trims

 

[seco services]

15" tryes go on 15" rims so 15" wheel trims.

 

[gman76]

Please buy genuine Citroen ones! The tacky Halfrauds and such like really do look awful.

It's covered in "How to make your car look crap" available in all good book shops (probably).

I implore you.