What's the actual size of Audi A3 8L 1.8T 110kW brake rotors?

Car in question: 1997 Audi A3 8L 1.8T 110kW
I can’t seem to find accurate information for this. Some sites claim that front rotors are 288x25mm vented, some claim 280x22mm.
My A3 is currently located ~80 miles away from me so I can’t measure it. Just wondering if anyone can give more accurate information about this.

Also, is it reasonable to buy a brake rotor+pad kit like this? http://www.ebay.com/itm/KIT-BRAKE-DISCS-BRAKE-PADS-FRONT-REAR-280-AUDI-A3-8L-1996-03-/381018796286