I guess, only having one return means I did pretty well with my ordering. The black Marc leather jacket was just too plain small. Of course, when I ordered there was no sizing advice so I bought my normal size L. The description said L = 12-14. I usually wear a 12, so assumed all would be well.
I couldn't even zip the jacket up, and the sleeves were ridiculously tight..sigh. Of course now the only sizes left are XS and S.

The jacket itself was very lovely, nicely made and the leather was thick and buttery.