Is this a standard or bantam Buff Brahma?

[chickenlver2013]

I got this little pullet at Tractor Supply and they were straight run. Is there a way to tell if it's a standard or bantam chicken?

 

[chickenlver2013]

 

[mshuntjump]

Looks like a 2 month old Standard. A bantam would look much scrawnier than your bird.