The size of the upper drawer of this Office 3-Drawer Mobile Vertical Filing Cabinet is 15.2″L x 12″W x 3.1″H, the size of the bottom drawer is 15.2″L x 12″W x 9.6″H, 2 front casters can be used Locked, 1 auxiliary caster can prevent tilting, steel material, fireproof, fully expandable drawers, can hold more things, and the surface of 3-Drawer Mobile Vertical Filing Cabinet uses environmentally friendly paint , Will not cause environmental pollution.