Ive tried many waist trainers, cinchers, corsets.. you name it! This 3 Spiral Steel Boned Waist Training Cincher is by far my favorite!! Very light & comfortable to wear. I wore this at 3 weeks postpartum and its helped my waist size tremendously. I wear this daily at the gym, under my clothes during errands and around the house. Please let me know if you have any sizing questions! S 24.4 - 26.8 M 26.8 - 29.1 L 29.1 - 31.5 XL