I tried again with a simple hat for Big B, and it fits! It's not quite long enough to cover his ears though, so we tried it on little b, and of course it's perfect. Big B is happy and loves to wear, and share, the hat. Maybe a third time will be the charm for him. That will have to wait though, as a new little baby to be born in April has ears that must stay warm. The pattern for this hat was my own, but adapted from the advice of a seasoned knitter. I'll refine it and post it for the next project, a very similar baby hat.