The most common widths for showers (in order) are 36”, 32” and 60”. Lengths will vary. While you may come across showers that are as small as 32” x 32” (think corner showers), most people would feel comfortable in a 48” x 36” shower. If your bathroom has a little more space available, a common recommendation would be to have a shower with minimum dimensions of 60” x 36”. Opt for a larger shower if you want to include benches or other features.