Any number is lucky in this hat; knit the brim to fit and take the numbers from there, for child or adult.
I’m excessively fond of I-cord edged garter stitch (thank you Elizabeth Zimmermann). It’s so elegant, warm and elastic. This fun little hat or headband makes the most of it.
An option for grafting the beginning and end of the brim together has been given for the questing knitter. It is possible, with a little practice, to achieve a perfect invisible join which adds to the style. You Tube support is included.

This project is also available as a kit from my website: http://www.lucyneatby.com/index.php?specific=1000762