Shower curtains come in two standard sizes: 72 inches wide and 72 inches high or 70 inches wide and 70 inches high, depending on the manufacturer. A standard shower curtain fits a standard 5-foot bathtub. The additional 10 or 12 inches is intended to accommodate the tub ledges.
For a shower stall, curtains are available in 36-inch, 42-inch or 54-inch widths and 72-inch or 78-inch heights.
A vinyl or plastic shower curtain liner can be used to protect a cloth shower curtain.
Shower curtains are used to prevent water from splashing on the bathroom floor, and they can also be decorative.