Made for higher safety and comfort, walk-in bathtubs have a watertight door and seat. These let the bather step into the bathtub over a low threshold. Thus, the design is quite accessible compared to conventional bathtubs since walk-in bathtubs make entering and exiting easier and more secure. They are perfect for people of every age and level of mobility. So, for those looking for a walk-in bathtub, here are a few things to know before purchasing one. Size of the tub There are plenty of shapes and sizes available for walk-in bathtubs. While most models feature a higher wall and thus appear bigger than conventional bathtubs, they can still fit in wherever the older bathtub was. So, there is no need to do any costly reconfiguration of the bathroom. However, always measure the older tub so that the newer walk-in tub is of the same dimensions. Options for door The door is one of the most crucial parts of any walk-in bathtub. One can simply walk into the bathtub with the door instead of climbing over it. This is what makes the bathtub safer and more secure. Based on the kind of walk-in bathtub one is considering, the door may open outward or into the bathtub.