Very Stylish New with tags - Women's Calvin Klein Hooded Puffer Jacket. Size Medium Available. See photos for description of material. Based on the tighter fit, I would say to Size up, especially if you want to wear anything bulky under this jacket. I can sometimes wear a small, but the medium fits better in this style of jacket. Calvin Klein Size Chart for Outerwear is as follows (however, see my comment above): Small - Size 6 - 8, Chest 35-36, Waist 27-28, Low Hip 37-38. Medium - Size 10 - 12, Chest 37-38.5, Waist 29-30.5, Low Hip 39-40.5. Large - Size 14 - 16, Chest 40, Waist 32, Low Hip 42.