The Swing 4 piece airflow bumper is 10.25 inches high x 158 inches long. The short sides are 10.25 inches x 27 inches with ties in each corner. The long sides are 10.25 inches x 52 inches, with 3 sets of ties along the top and bottom. The bumper is made of 100% polyester, with 100% polyester filling. The patent pending airflow bumper is designed to help prevent suffocation and rebreathing carbon dioxide. It keeps arms and legs from getting stuck in the crib slats. The fabric collapses to impede climbing. Care instructions: machine wash cold with like colors in gentle cycle, do NOT bleach, tumble dry low.