From The Wearable Studio:
The Marcie Headband can be made into a comfortable and versatile ear warmer using a variety of knit fabrics. It is a very easy and quick make, perfect for beginners or a great introductory make for those who have never sewn before.
Use a lightweight fabric for a sporty look or use a heavier fabric to make toasty ear warmers perfect for the colder seasons.
There are two versions and the only difference between the versions is location of the seam.
If you want to wear the band with narrower part at the front of your head, cut Version A.
If you want to wear the with the wider part at the front of your head, cut Version B.