Here is my tested and revised Skater Beanie pattern. It's available FREE on Ravelry here and via the below link as a FREE pdf download.
It has complete sizing instructions so that you can make a custom-fit beanie to fit any head. There are also instructions for whether you want to make the hat with stripes, or without - so it's completely up to you how you want to do it.
The pattern calls for dk or sport weight yarn, but you can actually use any yarn and any hook with this because you work out your measurements as you go along.
Please ensure that you have a tape measure to hand because you do have to take some key measurements and work a few things out before you begin.
The pattern may seem a bit long, but it contains loads of pictures and there's a few things I explain in a lot of depth - in particular the sizing, as it's key to the pattern working.
Please have a read through the pattern before you attempt it for the first time.
So download, and have some fun!
If you're a Ravelry member, you can see some examples of finished hats by clicking here.
BIG thank yous go to my lovely pattern testers, tinyteddies, drmonica, cellemonster and nursepickle.