Dimensions:20 inch:15"*10"*22" -- Travel days:1-524 inch:18"*11"*26" -- Travel days:5-728 inch:20"*12"*30" -- Travel days:7-10 Top Quality Luggage:Made of brand new extra-thick PC+ABS materials for hardshell,which make the luggage more durable,lighter and impact-resistant.Features textured finish to prevent against scratches,keeping cases beautiful after a trip.20in is best for carry on,24in & 28in expands 20% for more Spaces. Reasonable Partition:The suitcase features mesh dividers,cross straps and a zippered pocket to keep your items organized. Upgraded Design:The expandable feature increases luggage space by up to 20% for greater flexibility and organisation. Easy Mobility:The hardside luggage is equipped with a telescopic handle,grab handles,and 360° spinner wheels for easy flexible maneuvering. TSA Lock:TSA-approved lock lets agents inspect luggage without breaking the lock. Occasions:Stylish 20"/24"/28" luggage is your travel companion,suitable for short,back to school or college,business trips and many other scenarios.