SIZE CHART - THIS IS NOT YOUR AVERAGE LAB COAT.  It's meant to be fitted with lots of stretch to allow for comfort. Order your size like its a blazer.  Measured in Inches: 

Sizes XXS 00 XS 02 S 4-6 M 8-10 L 12-14
XL 16
Bust 31 32-33 34-35 36-38 39-41 42-43
Waist 24 25-26 27-28 29-31 32-34 35-36
Hip 34 35-36 37-38 39-40 41-43 44-45

HOW TO MEASURE: 

CHEST: Measure across the fullest part of your chest

WAIST: Measure around your waist around your narrowest point

HIP: Measure around your fullest part of your hip.