Please check the size carefully before you purchase, we don't accept returns for size problem, thanks for your understand.
China Size M ( US Size XS/S) fit chest 78-83cm/30.7" to 32.6", length without straps 21cm/8.26"
China Size L ( US Size S/M) fit chest 83-88cm/32.6 to 34.6", length without straps 21cm/8.26"
China Size XL ( US Size M/L) fit chest 88-94cm/34.6" to 37", length without straps 21cm/8.26"
China Size 2XL( US Size L/XL) fit chest 94-100cm/37" to 39.3", length without straps 21cm/8.26"