Part 1 Conducting Research. Understand what inventions or ideas are eligible for a patent. You can patent your idea if it's a process, a machine, an article of manufacture, a composition of matter, or an improvement of any of these.
Quick Answer. The standard size of a bathtub is 60 inches long, 32 inches wide and 18 inches tall. Standard-sized tubs are designed to fit into an alcove, surrounded by three walls. Alcove tubs are available in a wide variety of materials.
Freestanding tubs come in many designs to fit a variety of spaces, and they tend to be smaller and deeper than inset tubs, but they hold more water. They range in length from 4 feet to 6 feet and in width from 24 to 32 inches. Depth can range from 14 to 24 inches.