For this shrimp pasta recipe, medium, large or jumbo shrimp will work. Check the label on the package. The numbers tell you the size. For example jumbo16-20 means there are 16-20 shrimp per pound (450 grams). Large shrimp will show 25-30 per pound/450 grams. If you want juicy shrimp, do not overcook them. Larger shrimp will take longer.