The model is wearing a size small. Please see the size chart for reference 

Long Trend Coat with Removeable Faux Fur Collars, long sleeve, hidden sides pocket. 
Closure Types: Belted Closure in Waist-line 
Fit: Layer style, True-To-Size
Length: Below-Knee
Color: Black, Camel, Cream, Red
Size: XS-S-M-L-XL
Material Care: Remove Faux Fur before washing, Machine warm wash, Normal Cycle, Only Non-chlorine bleach when needed, Tumble Dry Low, Cool Iron if needed.

Outer: 100% Polyester Lining: 100% Polyester Faux Fur