The materials and the finishing of the curtain rod are also important to be considered before buying the curtain rod. A metal L shaped shower curtain rod can be a good choice, since it doesn’t get rusted and also easy to be installed in your bathroom. There are several things to consider when you want to choose a curtain rod for your bathroom. You should measure the length and width of the spot that you want to be curtained. This is necessary because you the size of there are different size of curtain rod; there are ones that are 66” long and there are also ones that are more than 66” long. Bathroom.