The guidelines I have from my provider are (for mush and normal stage after band)
~ food should fit onto a side plate.
~ eat a morsel of food about the size of a 50p piece and chew well, after eating, leave 30 seconds before taking another mouthful
~ eat ONLY for 20 mins. Do not eat more even if feeling hungry, if any food left throw it away.
The eating for 20 mins coincides with the length of time it takes for the stomach to brain to register that you're full and also limits the size of the meal that you're eating, so as not to stretch the pouch or stomach.
Just to say, I didnt feel any restriction after my band particularly, and I had my first fill last week at 5 weeks out, I still only feel limited restriction, but if I time myself like the above, I don't feel hungry.
Another thing is eat until you don't feel hungry within that time and not until you feel full . . .there is a difference. But stick to the 20 mins.