This product runs small. Size up for the best fit. Size small can fit as small as about a 24 inch waist.
S: fits waist 26-32 inches M: fits waist 32-34 inches L: fits waist 34-36 inches XL: fits waist 36-38 inches XXL: fits waist 38-40 inches 3XL: fits waist 40-42 inches