57mm Universal Alloy Wheel Centre Caps Audi TT A3 VW Seat Skoda Peugeot AEZ etc | eBay

Hey all, I am in the process of getting my stock wheels refurbed and thinking of running them without the large Audi centre caps, however I would still like a smaller cap for the centre where you can still see the spliney thing - does anyone what size these need to be (ie 57mm? Or would the above fit?) I would check myself but wheels are away being done!