Simple Beanie Crochet Ending?

Crocheted hads are traditionally worked from the center of the crown outward and then down to the brim. If you worked the hat in this way, you may be able to just tie off the end as it is.

If you tried to crochet this beanie from the brim up to the center of the crown, you're going to need a pattern to figure out how to close it at the top because this is not intuitive. Like maybe this one: http://operainjeans.wordpress.com/2010/08/28/ridic...

Even though you used a pattern stitch to decorate the sides, you can use plain sc to close the top and it will look fine. Hats are often worked with a plain pattern on the top of the crown and more decorative work on the sides.

Now, assuming you made the beanie from the crown out toward the brim, and made it a little bigger around than your head, and now need a hat band to gather it in a bit and secure it to your head.... Put the beanie on your head and pinch the edge together until you get a fit as snug as you want it to be. Without letting go of the pinch of fabric, remove the beanie from your head. Now carefully count how many stitches were in that pinch of fabric. That's how many decreases you need to make. Divide the number of stitches on the brim by the number of stitches you have to decrease. Say you have 60 stitches and need to decrease 6. 60/6 is 10. Now you crochet around doing 8 stitches normally and then crocheting together the 9th and 10th stitch Repeat all the way around the edge. It is not necessary for it to divide perfectly. Just round up to the next whole number and stop when you reach the end of the row even if you are a few stitches short of a full repeat.. Try the hat on to make sure it fits as expected. Now just do a few more rows around the brim without increasing or decreasing until the brim is as wide as you want it to be.

You can tie off your yarn, or do a decorative stitch on the last row. Here's an article describing several optional edgings: http://www.woolcrafting.com/crocheted-edgings.html

When you finish all your rows, it should fit around your head. Pull the yarn through the last stitch and pull it taut. Then, tuck in your loose ends and trim them. Done.