DD will be 2 in February, and while she IS a peanut..I'm still having a hard time deciding which size diaper to buy for her. She's wearing size 4 or 5 Luvs, which - despite the weird/narrow fit - have NEVER leaked on us! In the size 4's, it seems like I have to try to center her booty a bit, but they can hold what's dished out to 'em! The 5's seem to be a bit wide/tall so I have to fold them over a bit. Any opinions on which to stick with as the 4's are obviously a better deal for the $, but want her to be comfortable.
ETA: At her last check-up a couple of months ago she was only she was a little over 22 lbs., so she's probably within the weight range of size 4 still. Maybe she just has a big booty?