For second timers... Or first that are going through this now: so my baby was born on the smaller side-7lbs 1o he is only 3 weeks 4 days and around 10 lbs already. I was wondering if anybody else had crazy rapid growth like this? He's exclusively breast fed. I wa put on a feeding schedule of every 3 hours to try to make sure I'm not over feeding him and he still gains an average of 9 oz in 5-6 days. Anyways I'm just curious did your kids fit into their size 0-3 till they were actually 3 months or close like 2-1/2 I know that most brands size 0-3 go up to 12.5 lbs if that's the case I highly doubt he'll fit into it by 3 months unless he slows down quickly! Lol anyone else have any advice on this matter? Thanks in advance.