How do you know when your chicken has stopped growing?

[HersheyBar]

Hey guys! Hope your day has been going great! A quick question for any of you out there who can answer it. How do I know when my chicken has permanently stopped growing? Are there any signs you can tell they are officially full grown? Anyways, for any who will answer my question, a special thanks to you! Have a great rest of you day!

 

[JacinLarkwell]

Mine seem to be pretty much finished when they start laying