Exhaust diameter for a Peugeot 208 GTi 30th?

[bwoah]

Shot in the dark with this, new owner of a 208 GTi, but I can't get under the car, don't have the tools yet and google is no help at the minute.

I'm looking to find out the exhaust diameter for my 2015 208 GTi 30th Anniversary. The weld has failed on the exhaust mount, a common problem apparently, trying to buy a U Clamp as a replacement since it's better designed so this issue doesn't happen again, but obviously can't purchase the right one without knowing the diameter. I prefer it over getting a welder to reweld the join.

Anyone have any ideas? Appreciate the help.