Easy Diy Headband, Ear Warmer From An Old Sweater

First, you cut off one of the sleeves.
Turn your sleeve inside out. Now, decide how wide you want your headband. The final width of this one will be about 3 1/2″, so I measured 4″ to allow for the seam. Measure, mark and cut your sleeve lengthwise.
Pin the raw edges together lengthwise. Now, using either needle and thread or your sewing machine, sew straight down the pinned edge. Turn your headband right side out.
Look at the ends of your headband sweater fabric. You should have one finished end (the cuff) and one raw edge (where you cut the sleeve off the sweater). Tuck the raw edge into the cuff end. One end might be a bit bigger but tuck it in there as neatly as you can. Stretch the sweater if you need to. Pin in place, all the way around your headband. Using matching colored thread, hand stitch the two ends together, again going all the way around.
That's all there's to it!