Have you ever wanted to adjust a hat pattern or make your own hat pattern? I thought so. That's how I started down my journey of designing. You would not believe how many emails I get asking about adjusting patterns to another size. That's why I have put together this chart to help you along. I hope you enjoy your little journey as well!
| Age | Circumference | Length (from top of hat to bottom) |
|---|---|---|
| 2 lb Preemie | 9″ | 3 1/2″ |
| 4 lb Preemie | 11″ | 4″ |
| 6 lb Preemie | 13″ | 5″ |
| Newborn | 14″ | 6″ |
| 3-6 Months | 17″ | 7″ |
| 6-12 Months | 18″ | 7 1/2″ |
| Toddler (1-3 Years) | 19″ | 8″ |
| Child (4-10 Years) | 20″ | 8 1/2″ |
| Preteen/Teen (11-17 Years) | 21″ | 10″ |
| Adult Women | 22″ | 11″ |
| Adult Men | 23″ | 11 1/2″ |
I hope you found this helpful, and if you need to adjust yarn and hook sizes, you may find this chart helpful as well!


I’m looking for a hat that you can wear with a ponytail that is easy I have 3 daughters and it’s getting cold here thank you
Thank you so much for doing the work and slowing others to benefit. I’m making NICU hays and I needed a variety of sizes. This is perfect
Thank you!❤️
Thank you. I am a start all over newby so all the help. I get is appreciated. I only hope I figure it right.
Wow Thankyou this is very very useful
This is super helpful!!! Thanks so much for sharing this information for other crochers.
Thank you so much! I am 80 years of age and am learning to crochet for charity. Matching hooks to the right yarn and sizesof hats is really a great find. Thanks again.
thank you so much, my first attempt will now go to a 3 month old and I will start again.
When you say “circumference” do you mean of the head or the hat?
This chart is incredible! Thank you so much!