I was away 11 hours and my DD had 12oz, over 4 bottles (so 3oz each) from when I went back at 3 months, until 9 months when I started cutting back a bit.
I'd say smaller bottles are best at first.
Here is a helpful page from kelly mom about bottle feeding the breastfed baby:
kellymom.com :: How to bottle-feed the breastfed baby. Some of the points, like pacing, were important for us because my DD would guzzle a bottle and overeat, if we let her.