Labelled small but very generous fitting for all that from designer brand Vince with side plates and measuring 44 inches bust (meant to be worn loose and back length 28 inches. Quite slim sleeves but otherwise could probably be worn by a medium.
This is Becki. She models all of our size S jumpers. She usually wears a size 8. Her measurements are:
Height: 5'7", Bust: 32", Waist: 28", Hips: 37", Arm Length: 23"