I pump during my DD 2 day feeds, and (at least in the morning) I have been able to pump more than 5 oz from a single side (though 3-4 oz is more common). I like to beleive that my DD is able to nurse better than I can pump, so it's possible for her to get 6 oz on one side. If you're nervous about quantity you can always offer the second side after you finish the first (My DD will only occassionally want from the second side).