So in case you were wonderin'...
The jacket fits. I made a size 2 for Cenzo who is just shy of 20 months. It fits just right and when I make it again I'll just cut a little outside the pattern lines for any given size. The hood seems really big, but it looks cute that way. Since I cannot get him to wear it on his head for even a nanosecond I don't really know if it is a big hood. I still love it and I'll weep when he outgrows it.
... I made that