Pouch size?

Yes, it stands for Roux-en-Y and is the Gastric Bypass surgery.  Hope this helps! 

my surgeon handed me a medicine cup and said this is the size your stomach is going to be when im done .... you know those cups on top of the pepto bismol bottles? thats how he explained it  lots of luck to you you will do great think positive and stay away from negative vibes

Hmmm that seems smaller than an egg.  Interesting.  I've also heard some explain it as walnut size. 

Yes, positive thinking is the BEST way to go...only way in my book .  Thank you for reminding me though!