Is this a girl Buff Orpington?

[HBuehler]

The comb is very small for a leghorn pullet that age...My 4 weeker's combs are already bigger than hers Plus it looks like it has red ears not white. Possibly a Rock cross-tail doesn't look right for a pure Rock but it's possible it was just the pose.
BTW Buff Orpington's don't have yellow legs either...born buff and have a very pale looking leg...some say white but it's more like a white skin tone color.

 

[ging3rhoffman]

You know you can just order from a hatchery and they will be delivered to your home. I ordererd from Meyers Hatchery and they never messed up on the gender. Also below is picture of Buff Orpingtons.

 

[Hazelnut]

You wouldn't happen to be in Canada, would you? If so, she could be a White Chantecler. If not, she really looks like a white leghorn with a small comb (to me, anyway...I'm no expert!) Very beautiful girl!

 

[GardeNerd]

She looks like my leghorn hybrid (Hyline) pullet. Here was a picture from when she was about 12 weeks, but she is about 24 weeks now.

Here is mine Leghorn hybrid, on the right, at about 9 weeks old sitting next to my buff orpington, on the left.

And the two of them together as chicks, the leghorn is on the left and the buff on the right.

 

[Hazelnut]

I agree! She looks a lot like your Hyline Pullet. (GardeNerd, I remember reading about how you and your daughter hatched her from a Trader Joe's egg...what a amazing story!!)