The thicker, the better. Bear in mind that the lower gauge numbers mean more thickness, so don’t let that trick you. For example, a 14-inch gauge stainless steel sink is much better than a 20-inch stainless steel sink. The choice depends on your budget because thicker gauges cost more. 14-gauge is typically the best in the market, but up to 18-gauge is also decent. More than 18 isn’t worth your money; it’s better to look for materials other than stainless steel in this case.