What size shower curtain do I need for a standard tub versus a taller setup?

Most standard curtains here run roughly 71–72 inches wide and 72–74 inches tall, which fits a typical tub. If you have a raised rod, a walk-in, or want fabric that clears the floor, look at the 84-inch extra-long option — verified-purchase reviewers specifically buy those to avoid a too-short curtain.