Bunk beds are typically 39 inches (99cm) in width, 79 inches (200cm) in length and 65 inches (165cm) in height. However, some bunk beds differ slightly in size depending on the style and design of the bed frame. Always measure the allocated room space before making your purchase and ensure that there is at least 24 inches (61cm) of space between the top bunk and the ceiling. Check out our home-measuring guide for more information.