Olive is 2 years old and usually wears a size four. Today we were at a playdate and I forgot to bring a diaper... but Olive was able to wear the size 1 diaper from a two week old baby! Wth?? I think she's just kinda skinny in the waist... no way Charlie could've pulled that off at age two!!

What's the smallest diaper size your LO can wear in a pinch?