I know kids are all head but there's no way this would fit a little guy who's not quite a year old yet.
I thought changing the original pattern (worsted weight on size US 7 needles) to that of my own (dk weight on US 5 needles) would work out perfectly. Not.
So now it's back to the drawing board. Guess I'll just have to decrease the number of stitches cast on and fiddle with the rest of the numbers to get a smaller size.
It's all good though because I'm totally looking forward to knitting more of these.