Using contrasting yarn, sew the pieces of the hat together. I used blanket stitch to sew the pieces together along the sides and as decoration along the bottom of the hat. Leave the top about 2 inches of the hat unsewn to make the flappy part at the top.
Use a running stitch to close the top of the hat and gather the material, if you desire.
Sizing the Hat:
Want to knit a different size? This hat is knit about 2 inches smaller than the actual head circumference, so you can easily alter the pattern to fit any sized head. Each square is half the circumference of the finished hat, and is knit to the same length as the width. For different sized heads you may need to change where you put the stitching to close the top of the hat, but you can experiment once you have the hat pieces knit.