Re: fuzzibunz xs v OS? fb xs v bg 3.0 small?
We used FB xs right up until 8 weeks and 12 pounds, but by the end it was a stretch (just hadn't gotten around to getting the smalls ready yet, or I probably would have switched earlier). My LO was born at 7 pounds, so gaining 5 pounds total took 8 weeks. If you're already at 10 pounds, it probably wouldn't be worth the cost of buying xs's unless you're planning on using them for additional kids in the future.