Unlike ordinary rectangular baths, most deep baths have a shape similar to an oval or circle. In such baths, depth is important, not length, so you should not be surprised if they are even shorter than traditional baths. The depth is needed so that your whole body is in the water while you occupy a reclining pose, leaning your back to the back of the bath. It is also the cause of shortened length. Most of these baths will not allow the swimwear to lie down, but he can sit very conveniently.