Based on reviews (said it runs small) and customer service (said it runs large), I decided to order both sizes (small and medium). They arrived fast and well packaged. Excellent customer services btw!
I tried both sizes on a thin cotton shirt. Unfortunately, the shoulders/armpits are tight on both sizes. Somehow, medium one is even tighter than the small one. I also found out the left shoulder on the small size is tighter than the right shoulder!
I would say this jacket runs true size on bust and hip, but definitely small on shoulders and waist (especially zipped it).
For materials, the fur inside is very soft and thick (warm). The pockets are funny sewed though (kind of diggling inside). The outside leather is soft but rather thin. I like the leather liner on the pockets more than the main outside leather.
FIY: I'm 37-27-37. 115lbs