Beautiful zipper leg riding pants from Karl Lagerfeld and Chanel from the Fall 1992/93 Collection which was one of Lagerfeld's best with Claudia Schiffer as his muse.    
 
Size tag has been removed, but from other pairs I have owned from this collection, these are a size 38 and measure 26.25" for the waist, 37" for the hips and 30" for inseam.  Pants are in excellent lightly worn condition and looking at the waist, etc., these maybe were worn a handful of times.  
 
The pants have been worn, but are in excellent condition.  These is very little wrinkling, and the leather is soft and silky.  There is a tiny bit of puckering at the knees.  These pants are a cigarette / jean style that is close fitting.  With this kind of soft lambskin, there will be some stretch at the knees that occurs from sitting down / bending down which is normal.