Turbo Inlet Pipe - what size is the PCV?

[McDub]

I'm thinking of getting a silicon TIP, and it seems that the PCV valve is either 19mm or 25mm, and if it's 25mm, you buy a kit which includes an adapter...
So for an 03/04 model gti, what dimension is it?
i'm sure i could measure it, but i don't know which one it is

[TazzyVR6]

I have a feeling that the 150bhp 1.8T is 19mm and the 180bhp 1.8T is 25mm. Someone on here would know for sure.