My 2 pairs of classics just arrived today.. and yes i quickly compared the two together with my pioneer VFF's, the kso. At first i was a bit annoyed, the grey-orange classics I ordered was the wrong size while the black classics I ordered was correct in size. (I ordered from two different websites.) Originally I ordered Black M39, while for the grey-orange was W40 since M39 is not available for the said color. Lo and behold, the grey-orange classic that arrived was M40. Big of a size for me? Tried it and yet the fit is still great on my feet.. It maybe a little bigger than the size my feet is looking for but I may be one of the lucky people who could jump from different sizings.. my kso is W39, my black classics is M39, my grey-orange classics is M40.. any other size jumpers out there?