Space under bed is approximately 32 high x 75 wide x 38 1/4 inches deep. The twin bed on its own measures approx 49 1/4 high x 80 wide x 41 3/4 inches deep - (This is not a bunk bed - it is a twin bed, loft style). Total External Dimensions (space occupied in the room by the bed) is approx: 87 1/2 high x 98 wide x 84 3/4 inches deep.