Nine and a half inches between shelves takes a boot standing upright, where most low shoe racks force it onto its side. Four slatted pine tiers hold 55 lbs each, and the open slats let damp shoes dry rather than trapping moisture under a solid board. At 5.5 lbs the whole rack lifts out of the way for vacuuming with one hand. It measures 28 x 11 x 31 in with cross braces holding the frame square. Pine with PP connectors, sanded splinter-free. The same design is offered as a 3-tier; this is the 4-tier.