The standard size of the stomach can not be determined because your anatomy and surgeon's technique play a large role in your capacity. Everyone is restricted early out because of the trauma and swelling. At 2-3 months I could eat 2oz of meat, at 4-6 months I could eat 3oz of meat, and then around 8-9 months, my sleeve pretty much was matured, and I can eat 4-6oz of meat with a few bites of veggies or starch. At 28 months out, I can eat the same amount of meat, but I can have a couple ounces of veggies or starch with it. Those are slider foods, and don't take up much space.
As for dumping, only 30% of RNY patients dump, don't count on that to keep your hand out of the cookie jar. It's not a guarantee that you'll deal with dumping. And, none of the surgeries beat poor food choices so no matter which surgery you choose, what you put in your mouth is going to be the determining factor for your success.
As for hunger, I'm still never physically hunger. But, cravings are mental, and they operate on our stomachs not our brains. You'll have to learn the difference between head and physical hunger. It's different for everyone. If you eat scheduled and planned meals, you'll be able to determine real hunger from head hunger. My head hunger is "hmm that XX(snack) sounds good".
Band to VSG revision: June 3, 2009
SW 270lbs GW 150lbs CW Losing Pregancy Weight Maintenance goal W 125-130lbs