While shower bases do not come in standard sizes, common widths include 32", 36", 48" and 60", and lengths vary much more ranging from 26" to 72". The amount of space a shower base takes up also depends on its shape. Common shower base shapes include rectangle, square and neo-angle.
Standard sized shower bases do not exist, because it is more important to get a shower base that fits the space. To determine if a shower base is the right size for the space, consider the width of the shower walls. Shower walls are available in panels, so the shape and size of the shower are customizable to fit different sized bases.