Dimensions: 48” H x 44” D x 78” L, Twin beds support up to 200 Ibs. eachMade from responsibly-sourced solid pine woodNo box spring required, Bunkie board recommended; 5”- 9” mattress thickness recommendedIntegrated guardrails and ladder includedCombine with Alexander Twin over Low Loft Bunk Bed to make a triple bunk bed