If you're looking to indulge in crab legs, there's no need to worry about overindulging. One pound of crab legs contains approximately 16-20 crabs, and each crab leg is around 4 ounces. This means that one pound of crab legs will serve 2-4 people. So, if you're planning on eating crab legs as a main course, you should plan on eating 1/2 to 1 pound per person.