White Laced Red Cornish size?

[Southstar]

Hi, I had posted over in breed identification a while back asking what breed and sex my chicks were. Both ended up being female. One is very clearly a Black Australorp, Sweetpea. The other was sold as a Buff Orpington, Buttercup.
The "Buff Orpington" was way too dark in color once I had her for a week or so and I posted on here. She was identified as a White Laced Red Cornish and when I look up pictures, she is the spitting image of them.
I was wondering how big WLRC get, because Buttercup seems to be significantly smaller in size compared to Sweetpea in terms of growth.

 

[JacinLarkwell]

The bird pictured looms like a Delaware. Certainly not a WLR cornish

 

[Southstar]

My whole flock is in that picture. I'll crop it to the relevant birds
Edit: Just added a second picture

 

[JacinLarkwell]

Is she a bantam? If so, she'll get to be about 2-3 pounds max

 

[JacinLarkwell]

Here are some if my bantams. They fit nicely for nesting in those black rubber water buckets tsc has.

 

[Southstar]

She could definitely be a bantam. Her growth rate is pretty slow, although she is still growing.

 

[JacinLarkwell]

How old is she?

 

[Southstar]

I just weighed Buttercup, she weighs 1.5lbs vs Sweetpea's 4.5lbs. Both are almost 6 months old

 

[JacinLarkwell]

I'm thinking she's about full grown height wise. She might get another couple ounces (think females max out at about 2 pounds and males 2.5-3) but is expect her to be taller if she was a standard

 

[Southstar]

Are bantam chicks a smaller size as chicks? Because my girls were the same size for a while until my Australorp pulled ahead with growth