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.
Interior Dimensions. The interior measurements of a regular bathtub are 45 inches long by 22 inches wide and up to 18 1/2 inches deep. If the tub is filled to the brim, it can hold up to 24 gallons of water, but most individuals only use 10 to 16 gallons of water for bathing. Resources (1)