The best way to get your true size is to measure but for your convenience view the size chart below. 
Jean Size Chart
Size 4-6 XS
Size 4-6 Small
Size 6-8 Medium
Size 8-10 Large
Size 10-12 XL
Size 12-14 2XL
Size 14-16 3XL
Size 16-18 4XL
Size 18-20 5XL
WAIST TRAINER TRAINING TRIMMER BELT: Our waist trainer is made of 100% latex-free stretchy neoprene finest fabric, which means it is easy to clean, fits to your body, and will not pinch or irritate your skin. Double hook&loop adjustment for sizing accuracy.Mesh backing for breathability during hot sauna or other fitness activities.The waist cincher belt is perfect for weight loss training or even postpartum back support.
Waist Trainer