ésize :Medium /Large/X-Large/XX-Large Medium size-Fits waistline less than 64-79cm,25"-31" Large size--Fits waistline 75cm-87cm ,29.5"-34" X-Large size--Fits waistline 79cm-93cm ,31"-36.5" XX-Large size--Fits waistline 89-102 cm ,35"-40" NOTE: The size is correctly, buy some customers said it is small. Please measure your waist around the navel. suggest wearing it on a tank top or shirt will be better when doing some exercisingé