(9 KOs) May 21, Super middleweight ( lbs, kg, 12 st) September 24, Super featherweight ( lbs, 59 kg, 9 st 4 lbs). A weight class is a measurement weight range for boxers. The lower limit of a weight class is equal to the upper weight limit of the class below it. The top class, with no upper limit, is called heavyweight in professional boxing and super . lb / kg / 9 st 4 · , Super featherweight, Super featherweight, Junior The weigh-in · History · Professional boxing · Amateur boxing. VACANT, IBO. Jezreel, Corrales, PA, 25, WBA, , , 8, 0. Miguel, Berchelt, MX, 25, WBC, , , 28, 1. Gervonta, Davis, US, 22, IBF.