My DS was born at 4lbs5oz and is now 7lbs12oz.. he is a little over 2 months old ( almost 10 days corrected). I was going to buy more diapers in bulk, but not sure how much longer he will be in newborn size? How long / what size did your preemie graduate? Or the best way to tell? He is not "chunky" still, but really tall!

Re: How long in newborn size diapers?
Our experience is similar to dvwalborns; we switch over either at the low end of the next size or slightly before. I usually buy 1 pkg of the next size up and try it when I think we're ready. If I see gaps in the legs or at the back then I know we're not ready to move yet. Right now dd is almost ready for size 3 but not quite there yet so I only buy the size 2s week to week but have been buying the size 3s in bulk since I know she'll be in them for awhile. Hope that helps!