We love kinderpacks in our house, I had an infant chickens that I tried to max out with my off the charts little one, and finally jumped to get the bigger one. While he probably could have fit the standard just fine, this one he fits at the bottom end of the range, and will also work with my 3 year old! As always, these are one of the comfiest full buckle carriers for me, I prefer X back, but back carrying in H configuration is just as comfy!