This was so much fun to knit. So intuitive, didn't really need to look at a pattern. Have to make MORE. Including one for me (adult sized). Knit with doubled Lion Brand Sportweight (discontinued) and Noro Kureyon.
I used the free pattern "Firefly Baby Sweater" (link). Cast on 68 stitches. It ended up being a bit over 10 inches across the body, measured flat.