Bobby Blue -- newborn, size H hook
Indigo -- 3-6 months, size I hook

My first time crocheting something that actually has to fit! Usually I crochet afghans and the like. These were pretty fun to make -- very quick, and I enjoyed not having to switch to DPNs and fiddle around. They are worked top-down. Initially I made the little one in Bobby Blue, then began to fret because it looked so tiny! So I made another in a larger size with a larger hook. After blocking, the tiny one looks just right. Not a bad thing for “Ragnar” to have a larger hat for the winter, too, though.