Carry-On: 21.5' H x 14.25' W x 9.5' D Medium: 26.25' H x 25' W x 18'+ 2' exp. D Large: 30' H x 20' W x 12'+ 2' exp. D Lightweight and resistant ABS Double 360-degree spinner wheels (8 wheels) Telescopic trolley handle The carry-on has an integrated USB port The medium and large models have an extra handle on the side and rigid feet to protect shell from shock Zipper-release expansion system (20% more packing space) on medium and large models Dividing panel, practical mesh pockets and tightening straps