My LO is almost 2 moths and weighs close to 15 lbs. It's starting to get hard to get the prefold snappied now so I am starting to use our OS diapers. At 15 lbs I didn't think I'd have to worry about them fitting, but I am getting leaks in a lot of them. BG , TotsBots, and RaR fit with no problem, I have a hard time getting the FB to fit. Blueberries sometimes leak, Swadlebees gape really bad around the leg, and Kawaii and Oh Katy leak a lot. The inserts aren't saturated--they are just leaking out the leg. What am I doing wrong?
I haven't tried all of those brands, but I really do think it's true that certain diapers fit certain babies better. I have 2 OS FBs that always leak, without fail. I thought DD would eventually fit into them, but she's 18mo and 22 lbs and I finally decided to sell them. DD has skinny legs and I find that most pocket diapers don't work as well as other options on her. I also just recently sold my BG 4.0s and Kawaii's.
You're probably not doing anything wrong. Every brand fits a little differently and not everything is going to work for your baby. I just sold off a bunch of Kawaii and FB OS for exactly that reason. I agree that it is a good idea to wait a little while and try again, but it may be that those brands just aren't a good fit for your LO.
Re: Leaking in OS Diapers
I just didn't expect them to be too big on a 15 lbs baby. I will wait and try again.