For 11.5in Med length luxx curve waist trainer (will work with the waist trainers I have in my closet) Is your waist trainer just a LITTLE bit too small? We’ve got a solution for that! Our extenders are meant to help you get that waist trainer on so that you don’t have to return it for a bigger size. Our Dolls will often size out of their first waist trainer the quickest, which is why it’s better if your waist trainer is a little bit too tight rather than a little bit too big… it will last you longer!