Barred Rock bantam or no?

[Dogle08]

We got our Barred Rock out of a bin that said they were bantams. How would we know if she’s really a bantam? She seems to be about the same size as our other chickens. She started laying last week, her eggs are fairly small but again I don’t know if that’s just because she’s a new layer or what.
Thanks for any information or help!

 

[Amer]

Not a bantam.