One deep bin does the heavy lifting at the bottom, 25.5 by 16 by 14 inches and rated for 44 lbs, sized for the sprawling toys that never fit a cubby. Above it sit 4 smaller compartments in two sizes, 12.5 by 10 by 10.5 inches on top and 12.5 by 10 by 8.5 inches in the middle, each holding 22 lbs. The tabletop takes another 66 lbs for a lamp or a row of books. MDF and engineered wood keep the 3-tier frame rigid at 34.5 inches tall while the 26.5 by 16 inch base stays compact enough for a corner. Two anti-tipping devices bolt the shelf to the wall and anti-slip pads keep it from creeping across boards. Assembled weight comes to 34.5 lbs.