What is the standard size of a stainless steel sheet?

There isn't a single "standard" size for stainless steel sheets, as they are produced in various dimensions to suit different applications. However, provide you with some common sizes that are frequently used in industry:

4 feet x 8 feet (1219 mm x 2438 mm): This is one of the most common sizes in the United States.
5 feet x 10 feet (1524 mm x 3048 mm): Another popular size, especially for larger applications.
3 feet x 8 feet (914 mm x 2438 mm): Sometimes used for smaller projects.
1000 mm x 2000 mm (approximately 3.3 feet x 6.6 feet): A common metric size used in many countries.
The thickness of these sheets can also vary widely, typically ranging from 0.4 mm to 6 mm or more, depending on the specific application and grade of stainless steel.

It's worth noting that manufacturers often offer custom sizing options to meet specific project requirements.