✔HOW TO CHOOSE THE RIGHT SIZE? - In order to make the size suits you well, we kindly recommend that you measure your size from the largest circumference of abdomen, then compare it with the size chart. In order to make the waist trainer get a better body sculpting effect, when measuring, please kindly tighten the tape and your abdomen to the shape of you wear when wearing a waist trainer. This will usually be 2-3 inches less than when you measure in a fully relaxed posture.✔HOW TO CHOOSE THE CORRECT HEIGHT(LENGTH)? AND HOW DOES THE EXTENDER WORK? - We provide waist trainer corset in three heights of 11.2 '', 10.23 ''and 9.45 '', and list the height data in each color name, you can determine the proper height by measuring the distance from the bottom of the breast to the hip. The size chart is the size of the corset itself, excluding extender, extender plays an auxiliary role. Please kindly choose according to the size of the corset itself without extender.✔OPTIMIZED DESIGN - 3 layers 9 fish scale memory flexi steel bones to provide support without inhibiting movement. 100% Natural Latex(BPA-free, SGS-tested) covering, 96% Cotton+4% Spandex Lining, 6 hooks-and-eyes closures for flexible sizing. Longer in the front and shorter in the back for maximum comfort while sitting down. If you choice mesh breathable latex waist cincher, breathable design and cotton lining make it could absorb and discharge sweat more quickly.✔FAT BURN & ACCELERATE SWEATING - With a balanced diet and reasonable exercise, this waist trimmer can help you promote local blood circulation, increase the temperature of your waist and abdomen, accelerate sweating and fat burning, let metabolize faster, giving you the dual effect of exercise and sauna. If you are undergoing postpartum recovery, this postpartum belly wrap can help you tighten your waist and abdomen muscles and make them more stronger. It will never let you down.✔FOR EVERYDAY USE - gym, running, yoga, aerobics, jogging, hiking, walking dogs, driving, postpartum recovery, weddings and brides, Social and banquet, housework, office. Protecting core muscle groups and reduce the risk of injury during sporting. No matter when you wear this waist slimmer, you can get about 3-4 inch waist line reduction instantly, make your body curve more attractive. You will be the focus of attention.