SKHerb, it's kind of hard to tell what a serving is!
This is one of my big beefs and I have no idea how to really solve it. For now, I'm going on what the packages say. If the package says one pita is the serving, that's what I'm eating. And so far it seemed to be working...lately I've plateaued, so...
In the GFGCG, it says that 1 pita is a serving. That is a 6" pita. Got a ruler?
Seriously, I'd go with one. You should be fine.
Ruth?