Corsets are sized by waist size. So please choose your corset according to your waistline. not your… Corsets are sized by waist size. So please choose your corset according to your waistline. not your bust. If your waist measurment is between two size, please choose the smaller size. Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)