Hope this is the right place to ask. I've just had my 17inch alloys refurbished in glossy black. I want to get some black covers for the wheel nuts. I know they are 19mm but I seem to think the locking wheel nut is larger than that. As I've been unable so far to find a specific set for my 2016 1.5 TDCi I wonder if anyone can please advise this silver surfer what size the locking wheel nut is compared to the other three nuts (hope that makes sense). I've seen ones for other makes and the locking nuts seem to vary (up to 25mm for an Audi?). If anyone has any additional info as to where I can obtain a set that would fit it would be greatly appreciated. Best wishes. Paul.