Make a slip knot and add it onto your hook. Tighten it.
To begin the hat, chain 37.
Insert 1 double crochet into each chain across (skipping the first 2) for a total of 35 double crochets.
Turn your work and chain 2.
Insert 1 double crochet into the back loop only of each stitch across.
Here's what 1 double crochet into each back loop will look like.
Repeat this pattern 25 times, for a total of 27 rows.
Step 3: Assemble the hat
Cut off the yarn, leaving a tail of at least 6 inches.
Tie off your yarn.
Fold the rectangle in half, crosswise.
Thread a yarn needle with about 18 inches of yarn. Then sew the last row to the foundation chain, creating a tube.
Sew a running stitch around the top of the hat.
Once you've sewn all the way around, pull the yarn to gather the top of the hat together.
Tie off the end of the yarn to one of the loose ends.
Turn the hat inside out.
Step 4: Attach a pom pom
Fasten your pom pom to the hat using the tails of the yarn.To do this, pull out the yarn from inside the hat and bring the tail through the elastic loop of the pom pom.
Loop the tails through the the pom pom's loop several times and then tie a double knot to secure it.
Tie off the ends through the gap in the top of the hat. Knot several times to secure it. This should close the gap in the hat as well.
Fold up the brim of the hat a couple inches, or whatever you think looks best.