IKEA. Marius Stool, Black 101.356.59 Product dimensions: Tested for: 220 lb, Seat diameter: 12 5/8", Seat height: 17 3/4", Width: 15 3/4". Product description: Seat/ Foot: Polypropylene. Leg: Steel, Epoxy/polyester powder coating. Care instructions: Wipe clean with a damp cloth. Wipe dry with a clean cloth. For increased stability, re-tighten the screws about two weeks after assembly.