Take an old sweeter and cut the bottom of one side (choose the one that looks better :D The height of the square is about 25 cm.

Now fringe it. Leave the bottom of the sweeter. It looks good at it is. It will be around your face.

Place it the good eyes facing you. the bottom of the sweeter should be at the bottom too :) Now fold it to the left and sew as shown. Sew the top and 1/3 on the left side.

Fringe or crochet the unsewed side once more using a thicker thread.

Add details if you want. I added some tassels. It's done :)

Your hat is ready to wear.