The measurements for a standard bathtub are 5 feet long by 30 to 32 inches wide. It is difficult to find bathtubs smaller than this, although custom made bathtubs can be purchased from some manufacturers. American Standard also has an economy tub that is 4 feet long.
The size of a bathtub is important to many people, especially tall people who tend to have difficultly with low tub rims. A corner bathtub normally has a triangular shape and is a good option for those with limited space. Another alternative is to install a shower, which can be custom made to fit almost any dimension.