How large are chickens?
Chickens can vary in size greatly by breed! Large fowl chickens can range from 4 pounds for small hens to nearly 15 for the largest roosters. Bantams vary in size, too. They can weigh from a few ounces for the tiniest seramas to more than two pounds for larger bantams. Generally speaking, bantam versions of large fowl breeds tend to be 1/3 to 1/2 the size of the larger birds.