Circumfrace on the VW hat

I’m making the VW hat it says to cast on 90 stitches but my guys have different size heads so how to I know how to measure for the hat size and how many stitches to put on.

I believe you cast on 90 no matter what size head. it’s the length of the hat that can be varied for different sized heads.
check the original thread here:

http://www.knittinghelp.com/knitting/forum/viewtopic.php?t=123

I’m going to do this hat soon, with the addition of the VW Racing .:R on it or the Audi rings as well. we eat, sleep, and breathe VWs and Audis at my house, and my husband makes a living and employs 4 people by working on and modifying them. :heart: