Reinforced Load-Bearing Capacity: Our four-step ladder adopts thickened steel pipes and thickened and widened pedals to bear up to 400 pounds. All linkage mechanisms are upgraded to metal riveting technology, making the ladder more stable, solid and durable. Precise Measurements: Open: 57.5" x 36.8" x 18.1", Folded: 62.6" x 18.1" x 2.7", Net Weight: 18.7 pounds, Maximum Load: 400 pounds. Top standing platform size: 14.2" x 10.6". The middle and lowest platform measure 14.2" x 8.1"; supporting you 37.8" above ground.