The length? they are same as standard alloys lengthwise I believe. I bought them from Audi with a set of QT alloys (Hence not cheap), many a year ago and can't remember what they cost now. I have been through a couple of sets of QT's.
I sold wheels but kept the bolts to see if they will fit my DTM. I haven't removed the alloys on my DTM to see if they fit as yet. Car's not here otherwise I'd check for you, won't know till next week. The bolts on the DTM have caps on them and since they are fiddly to remove before you can get to bolt head to put wheel brace on, I was hoping it would be easier on my back if I just had these chromed bolts onto which the brace can go straight onto. If they don't fit they may well be up for sale! (bagged, sealed brand new).
Sarge