Superior Quality: Solid, knot free, New Zealand pine wood bed frame. Durable, non-toxic, low VOC finish Sturdy & Stable: High, 400-pound resting weight capacity per sleeping surface. Strong plywood slats with metal support bar Low Bunk + Staircase , Clean Design: Slatted headboard with flush, color matching hardware for a clean finish Space-saving: Total footprint (including staircase) 99.5"L X 42.5"W X 50"H; Actual bed measurements excluding staircase 81.5"L X 42.5"W X 50"H. At 50 inches high its ideal for low ceilings. Underbed Height is 33.25 inches. Extra space for storage in built-in staircase shelves Versatile: staircase can be installed on the left or right during assembly Generous 14-inch safety guard rails. For best fit and safety, use with a 5-inch-thick mattress. Do not exceed a mattress thickness of 8 inches Versatile: staircase can be installed on left or right hand side during assembly. Extra space for storage in built-in shelves underneath the staircase Designed to accommodate standard twin size mattress; we recommend a 5 inch mattress and not to exceed 8-inch-thick mattress. Plywood slats included; no box spring or bunkie board required. Mattress and bedding not included This bed meets or exceeds federal safety standards for children’s furniture Ships in several boxes, may ship separately