A. Shower curtain length depends a lot on where you're installing it. For both built-in and clawfoot bathtubs, your shower curtain length should be 7-11 inches less than the distance from the bottom of your tub to the ceiling. For stand-alone showers, the length should be 3-4 inches less than the distance from the shower pan to the ceiling. Please note that for hygienic reasons, shower curtains cannot be returned once opened, so please measure and make sure of the size you need before ordering.