For what it's worth, my DD potty-trained before she outgrew her mediums. So you might not need larges, or maybe just a few for nighttime. I plan on using more OS diapers this time around with DS once he's fully out of NB diapers. At 10 lbs, he's almost there. Some OS diapers already fit him OK.
K & B since 10/2003
Added our sweet little C
4/2008 and our baby boy I 12/2012