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.
The standard height for bathroom sinks used to be 30 inches. Vanities were built at 28-1/2 inches and a 1-1/2-inch countertop with sink was added on top. These 30-inch-high vanities and sinks are still available and many people find them preferable.