Published at Sunday, July 29th 2018, 02:08:20 AM by Janine Lang. Shower Curtain. All bathroom shower curtains are the same length measuring 72" long. They also are all one width, generally 70" wide. Some shower rods will require two of the same curtain to cover the entire rod like with an oval curtain rod. Vinyl liners are also the same size and designed to be placed behind a fabric curtain so the fabric does not fade or mildew or allow water to soak the bathroom floor. If you find that your vinyl liners are too long and show beneath the fabric curtain, you can always cut the bottom of them off shorter than the fabric curtain. This will not affect its efficiency in keeping water from soaking the floor.