My LO's are now in the same size diaper, which is crazy! They are 8 months old and 27 months old both in size 4. I don't even think they are 10 pounds apart though! Granted the 4's are slightly big on LO2 and getting small on LO1, but for now it sure makes things easier!

We're your LO's ever in the same size diaper? How long did it last before having to move a LO up?