Dimensions 28 is 28 x 18 x 9 and 10.2 lbs. 24 is 24 x 16 x 8 and 8.2 lbs. 20 is 20 x 14 x 7 and 7.2 lbs. * Durable die-cast zinc hardware * Pull-out ID tag conceals personal information * Expands 1.5 for additional packing space when you need it * Interior mesh pockets for added organization