Sink thickness, or gauge, is an important factor to consider when buying a new sink. The thickness of the metal affects the durability, noise level, and appearance of the sink. Generally, the thicker the metal, the more resistant it is to denting and scratching, the quieter it is when water hits the surface, and the more polished it looks. However, thicker metal also means higher cost and weight.

According to my web search results, the standard thickness for most American metal sinks is 18 gauge. This means that the metal is 0.05 inches thick. However, there are also sinks available in other gauges, ranging from 8 to 23. A sink with an 8 gauge is 0.172 inches thick, while one with a 16 gauge is 0.063 inches thick. The thinnest stainless-steel sinks are 22 or 23 gauge, and high-end thicker sinks are 18 or 19 gauges.

The choice of sink thickness depends on your personal preference, budget, and kitchen design. Some people may prefer a thinner sink because it is lighter and easier to install, while others may opt for a thicker sink because it is more durable and elegant. You should also consider the size and shape of your sink cabinet and countertop, as they may limit your options for sink sizes and dimensions. The average size of a sink measures 22-by-30 inches (Length by Width), but there are also smaller and larger sizes available.