Practical Ortho Mini-drawer Model Storage Boxes may be stacked, mixed and matched for a most flexible storage system. Access models by sliding them out of their surrounding sleeve, "drawer-style." Four-compartment size is exactly one-half the width of eight-compartment size to keep stacks uniform. Boxes arrive flat to conserve storage space prior to use. Each box comes with a lower tray, compartment dividers and a sleeve that all pop open for assembly in seconds. All compartments measure 1 7/8"H x 2 3/4"W x 3 3/8"L inside. Manufactured from recycled paperboard. 50 white boxes per case. 2"H x 11"L x 3 1/2"W outside.