How many pound of steak for 4 people?

Steak serving sizes at restaurants usually come in 8oz, 10oz, or 12oz.

Depending on the type of meal that is being planned and what other dishes there may be, I would say around 40oz of steak for 4 people. 40oz of steak is equivalent to 2.5 pounds of steak (1 pound = 16 ounces).