Lightweight and Space-Saving - The ladder for bookshelf comes fully assembled! Easy folding design for convenient storage and transportation. Unfolded: 31"H X 18"L X 27.1"W, Folded: 35.8"H X 18"L X 2.2"W, Net Weight: 8.8 pounds. Anti-Slip and Wide Pedal - To ensure the safety, the pedal is 7.9''X12.6'', wide and long enough to stand on easily and steady. The surface of the paddle has prominent lines to prevent slipping.