Wood Arched Design Twin Over Twin Size Convertible Bunk Bed With Ladder (Cherry) Wood Arched Design Twin Over Twin Size Convertible Bunk Bed With Ladder. Select Hardwoods & Veneers, 65mm Wood Posts, Arched Curved, Splits Into Two Beds, 12 Slats. Dimensions: 83"W x 42"D x 64"H Simple assembly required.