External diameter of 197 exhaust tip

Been searching all over the forum for the external diameter measurement of the slash tip but i've found conflicting values. I've just tried to measure my own one but can't get to it properly with the 200 diffuser on.

Does anyone know what it is off the top of their head? Thanks.
 
I had a milltek fitted yesterday, they said the external diameter of my original was 60 and the milltek was 63 internal, they didn't think it would fit but the clamp closed it up perfect, hope this helps.