[Jethrow]

Hi all.
I am considering these to put on my 17" tyres. But what size should I use?

There is four options, being:
1″ Modern Stretched Billboard
2″ Standard Vintage Tire Kit
2.25″ XL
2.5″ XXL

But I am not 100% sure what the sizing means? Is it the height of the letters? What looks best on a 17" rim?

Thanks