Hello, the waist measurements in the size chart are the 'half waist' (from left to right) measurement taken before the product is worn, on a flat surface and without stretching the elastic. When the tire is stretched, the measurement increases; this increase is not included in the table. For the most accurate comparison, we recommend measuring the waist of your current, comfortable-fitting tracksuit against a flat surface and matching it to the corresponding size in the chart. If you are stuck between two sizes, you can choose one size larger for comfort. Wear it on good days � � Please note that our recommendations are estimates. For detailed information, you can take a look at our size chart at the end of the product images and product descriptions. By the way, remember to get your coupon by following our store � � Best regards ♥️ comeor