Recommend size to be purchased a size up. Example if your a Medium in size a size Large should work for you. If your an XS a size small should work. If your unsure always purchase a size up. Add additional confidence to your workout routine with our reflective waist trainers. Adding additional support and sweat to your routine. Working out the problem areas we hate the most...our lower and upper back, side and abdominal areas. Even if your just doing chores around the house get maximum results and shed inches off your waist! Our waist trainers can be compared to any popular brand for a better price, a lighter fit and Great result. Quality guarantee.