What is the smallest rooster size?

There isn't a universally agreed-upon "smallest rooster size." Rooster size can vary greatly depending on the breed. Some breeds, like the Bantam varieties, are bred for their small size and can be as small as 1.5 pounds. Others, like the Jersey Giant, can weigh over 10 pounds.

Here are some examples of small rooster breeds:

* Bantam varieties: These are miniature versions of standard chicken breeds and generally weigh between 1 and 2 pounds. Some popular Bantam breeds include the Sebright Bantam, the Cochin Bantam, and the Wyandotte Bantam.

* Other small breeds: Some non-Bantam breeds are also relatively small, like the Ameraucana and the Polish. These breeds typically weigh between 3 and 4 pounds.

So, the smallest rooster size depends on the breed. To answer your question more specifically, you'd need to specify the breed you're interested in.