totally unrelated both from my hatch are cockerels even the blueFound this online. It's from the Leghorn Breeder's Club of Australia. It does specify the weight for bantams.
http://leghornbreeders.webs.com/leghornstandards.htm
Bantam cocks should top out at about at 2.4 pounds. Standard sized rooster is about 7.5 pounds.
They aren't just smaller than average Leghorns. They are much, much smaller.
Serema are a true bantam. Good ones have a very distinct posture and shape. And they are tiny, even compared to most bantam breeds. Day old chicks are sometimes the size of a thumb nail. Adults usually don't even weigh a full pound.
so I will let them grow up and freezer camp for both