Lift the slatted top and there is an 18 x 18 x 15 in compartment underneath - deep enough for seat cushions, garden tools or a folded blanket, which is the difference between a side table and this one. A 2.3-in umbrella hole through the lid takes a standard pole, so the same piece anchors shade and stores what the shade protects. Solid acacia carries 165 lbs on top. The box measures 21 x 21 x 19 in and weighs 27 lbs, heavy enough to stay put. Treat the wood with maintenance oil each season.