Extra small : bust 31-33, waist 24-26, hip 33-35
Small : bust 33-35, waist 27-29, hip 36-37
Medium: bust 36-38, waist 30-32, hip 38-39
Large: bust 37-40, waist 33-36, hip 40-42
Extra large: bust 40-43, waist 37-40, hip 43-45
Every body is different, and these sizes are provided so that you can best determine the fit you would prefer. If you are between sizes, a smaller fit will most likely be more form fitting, not overly tight. If you prefer a more roomy fit, a larger size might be better.
Check out Moth & Rust Apparel on Instagram to see these garments worn and get an idea of fit, and be sure to know your current measurements before placing an order!