It's a tough call. One of the pics you have your hair pulled back, so you can't tell about the curl formation. The other pic your hair looks chin-length and sometimes shorter hair can fool you.
Anyway, I'm gonna vote for 3A. Your curls look a bit big and loose to be a 3B to me.
Your hair is very pretty.
Welcome to NC.com
my Fotki hair journey/experiment diary PW is brio (and I really need to update it!)
3A hair; coloring with henna/indigo since July 2009; normally follow the CG method. Still searching for my HG products!