Hat Sizing Chart
Getting the sizing right can be very frustrating when you’re designing a new hat pattern. I recently put this hat sizing chart together to try and make that process a little smoother. This hat sizing chart gives you the approximate measurements for a simple beanie style hat.
How to Use this Chart:
Each finished hat size is determined by the Crown Circle Diameter. Simply work an increasing circle in any style/pattern you like until the circle measures the diameter stated for the size you want. Stop increasing once you meet that crown circle diameter. As you continue the hat, the brim will work out to be the circumference you need for the size you want.
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This is the formula I used to get the Crown Circle Diameter necessary to obtain the finished hat circumference you want: Head Circumference / 3 = ___ – 1 = Crown Circle Diameter.
EXAMPLE: Let’s say you’re making hat for a 0-3 Month old baby. You know that babies that old usually have a head circumference of 13½-14″ around. You want this hat to be a little on the larger side so the baby can wear it longer, so you decide to go with 14″. You know that you will need to factor in some negative stretch, and this formula does that for you. So, the equation is as follows: 14″ /3 = 4¾” -1 = 3¾”. Now you know you should work your beginning crown circle to a diameter of 3¾”. That will give you a finished hat circumference of 13″ which will have 1″ of negative stretch. Voila!
This is the formula I used to get the Hat Height: Head Circumference x 0.4 = Hat Height.
EXAMPLE: Lets use our 0-3 Month old baby hat again. Our head circumference was 14″. So the equation is as follows: 14″ x 0.4 = 5½”. So you would want to work this hat to a length of 5½”.
You can use these equations for any hat circumference you need to obtain.
If you like this Hat Sizing Chart, please share it!
To see how to use this chart to make perfectly sized Bottom Up Hats see this post: http://knitsycrochet.com/sizing-bottom-up-hats/