Usually this size is based on the size of common bathtub, because the function of this curtain rod is not only for shower but it can also be used for bathtub. Decorating bathroom is one of the most interesting things that people can do. It is so because there are many different things that can be used and done to beautify you bathroom based on your taste and bathroom concept. One thing that can be decorated is your shower. Having a curtain rod around your shower can make your bathroom looks more elegant and classy. Bathroom.