pretty big look at the dimensions and your tub before ordering [SEP] beware this is pretty big and if your bathtub curves in at all it is not going to stick frankly i have not seen a totally square bathtub in my life so we do not use it and i feel bad because it is just another thing for the landfill i had another one too the shell shaped one and that did not stick either but we did finally get a neck roll one that works very nicely