Re: Would you ever skip newborn size?
I'm going to be the naysayer that says that daddy AND mommy's size do partly determine baby's size. It's simple genetics. I was 9lbs, 9oz and DH was 9lbs, 15oz. DD was 8lbs, 11oz at 2 weeks early. Out of all the babies on either side of the family, dating back to the great grandparents, DD was the smallest baby.
However, I do agree that OS diapers do not generally fit until closer to 12ish pounds, so I'd still go with newborn diapers. Maybe a rental program would be good for you?
April + Stephen = Eva, Reese, and Baby 3.0 (due Nov '14)