The standard shower curtain size varies slightly, but most sources agree that the industry standard for a shower curtain is 72 inches by 72 inches. This size is designed to fit a standard 60-inch-long tub and incorporates an extra 12 inches of width to ensure a full appearance and generous folds when pulled shut. However, there are other standard sizes available for different types of showers. For example, for extra-tall showers, the standard shower curtain size is 70 x 84 inches or 72 x 84 inches. For extra-wide showers, the standard size is 144 x 72 inches. For shower stalls, the standard size is 54 x 72 inches or 54 x 78 inches. Its important to measure your shower space to ensure the right fit. When measuring for a shower curtain, you should measure the width of your shower from wall to wall and add 12 inches to the measurement to ensure the shower has a relaxed look when it’s closed. You should also measure the distance from the curtain rod to the floor and subtract 8-10 inches from the rod to floor measurement to avoid the curtain hitting the floor.