Very nice pair of black leather pants from Gianni Versace's Versus line.  The pants are done in a slight-low rise Moto / Biker style with padding details at the knees and seat.  These almost have a breaches cut/seaming to them.

These are marked a size 40, which normally is a US 4, but these seam to be a little on the large size and I think more of a US 6.  Please note, while the waist across is 15" for what would be a 30" waist, these sit lower on the hips with about an 8.5" rise, so natural waist is likely more around 27".  The hips are 36" which I really use more for sizing, and inseam is just over 30"