No. Sorry, I missed a word.
Smaller Golfs have 255y10 on rear (some 4-motion have 260 mm),
newer Mk.VI GTIs have 272x12 and former GTIs 286x12.
All 3.2 VR6 modell and the Mk.VI R have 310x20 vented rotors.
But rear doesn't make any difference on track. Rear brakes are
important when car is fully loaded and/or you pull an caravan.
So I'd only spend money for expensive front rotors.