How wide are knitted headbands?
Cast on the number of stitches you’d need for the final piece to be 2.5″ (6.4 cm) wide. (If you were getting 10 stitches per inch, you’d cast on 25, for example.) In this example, it’ll be 16 stitches for size 8 to 10 needles. You can make a headband that is a bit wider or skinnier if you choose.
How long should headbands be?
A headband/ear warmer should be about 4″ wide. This is the perfect size to cover ears and keep you warm. You could change this easily if you’d like it smaller or even wider. In my experience I found that 4″ tends to be the ideal size for most ear warmer patterns.