Because the bathtub/shower area of the bathroom takes up so much room, it often functions as the room's focal point. The room's focal point draws the eye, provides the room with visual interest and helps to make the elements of the room look cohesive. A shower curtain serves this decorative function, but should address the practical requirements of the bath and shower area in your bathroom as well.
Although most people choose a shower curtain for its decorative potential, it also prevents the walls and floors from getting wet, and provides the bather with privacy. A shower curtain should be the right length and width to address these issues.
According to the Save On Crafts website, the standard shower curtain measures 72 inches by 72 inches. The shower curtain should fit on the rod with no openings on either side and fall a few inches below the top of the tub.
If you choose a fabric shower curtain, get a plastic shower liner to go underneath it. The liner is usually the same height as the shower curtain and goes inside the tub while showering. A standard shower curtain may not fit a camper or a custom-built shower. In this case, you may need a custom-built shower curtain.