Soft Lyocell (very similar to tencel) pants have a pleated button/zipper front with a stretch waist elastic back.  Wide leg design.
 
Measurements:
Small waist *Stretched*: 32 inches
Medium waist *Stretched: 34 inches
Large waist *Stretched: 36.5 inches
 
Small hips: 38 inches
Medium hips: 40 inches
Large hips: 42 inches
 
Small length: 29 inches inseam
Medium length: 29.5 inches inseam
Large length: 29.5
 
100% lyocell
Imported.