Measurements laying flat (measurements are approximate):
XS Bust 17 inches, Waist 17.5 inches
S Bust 18 inches, Waist 18.5 inches
M Bust 19.5 inches, Waist 20 inches
L Bust 20.5 inches, Waist 21 inches
XL Bust 21.5 inches, Waist 22 inches
2X Bust 25.5 inches, Waist 27 inches
3X Bust 27 inches, Waist 29.5 inches