Measurement Chart for Hats
Here is a handy measurement chart for making hats from baby through adult sizes. The chart above and notes below it are an image file so you can save it and print it out if you'd like. I have made hundreds of hats using these measurements, so I can vouch for their accuracy. Of course, these are just averages since everyone's size and shape is different. I hope this helps you with your crochet / knit / sewing hat projects!