She is full grown. She's the size of my D'Uccle! Her cheek feathers are finally sprouting out! Being in that egg severely stunted her growth.
She's a very sweet pullet along with her buddies a RIR and an Andulasion which are 2-2.5 months younger then her.
Also, her name has changed to Stormy.
I recently helped another egg that was too big for the shell. There was no room for zipping and was pipped for over 24 hours. S/he too had leg problems(splay leg) and very weak. After splinting for 24 hours and vitamins, the chick made a full recovery. This chick wasn't nearly as strong as Stormy! I finally got an incubator, so no more shrink wrapped chicks!
Here S/he is, a pure Ameraucana. Unfortunately a splash color, so S/he will go to a new home with a few others. I'm hatching for show chicks.

.
A few hours old unable to use legs.
24 hours old after splints were off and a lot of encouragement to walk.
Hatched just a few days ago with 8 other hatch mates.
Helping chicks from the shell requires a lot of help and vitamins.

. As long as the chick as a good chance of life, I'll help it.