Hat Sizing Chart

I refer to this chart A LOT! You’ll hear me mention it in videos; you’ll see it included in some of my patterns and I often refer to it when I’m working on a hat! The actual info in the chart came from a blog called Slugs on the Refrigerator but it’s not available in its original form. (Looks like the website was redesigned and the chart lost it’s formatting.) Just for convenience, I put it back into an easy-to-read table below.

Have trouble printing from this site? Download the hat-sizing-chart here.

Age Head Size Hat Size Hat Height Flat Circle Diameter 
0-6 months 13 – 15 inches 12 -14  inches 4.5 – 5 inches 4 inches
6-12 months 16 – 19 inches 14 – 18 inches 5.5 inches 4.5 inches
1 – 3 Years 18 – 21 inches 17 – 20 inches 6.5 inches 5.5 inches
4+ years 20 – 22 inches 19 – 21 inches 7.5 inches 6 inches
Women 22 inches 20 inches 8.5 inches 6.5 inches
Men 23 inches 21 inches 9.5 inches 6.75 inches

NOTE: Flat Circle Diameter measurement is for top-down crochet construction.