Features: Our Waist Trainers are designed to be extremely versatile, use in the gym or an the most formal of occasions.Improves posture, ensures effortless perfect posture while looking and feeling great Size XS:Waist:22"-24" Size S: Waist:24"-26" Size M:Waist:26"-28" Size L:Waist:28"-30" Size XL:Waist:30"-32" Size XXL:Waist:32"-34" Size XXXL:Waist:34"-36" Size XXXXL:Waist:36"-38" Size XXXXXL:Waist:38"-40" Size XXXXXXL:Waist:40"-42" Please use our own Size Chart guide located on the left of the product image, choose the size based on Your Waist Size.