Most breeds you will get a good increase in size after their first adult molt. Yours are still young yet, they'll get bigger.
It's also can be breed related. I have a 3 year old BR that lays jumbo eggs and a 3 year old brahma that lays medium sized eggs. Not all breeds are designed to lay large eggs.
It's also can be breed related. I have a 3 year old BR that lays jumbo eggs and a 3 year old brahma that lays medium sized eggs. Not all breeds are designed to lay large eggs.