http://dailydorius.blogspot.com/2014/06/diy-01-knotted-sailor-headband.html DIY: Sailor knot headband! This is super easy to make and the tutorial is easy to follow along. All you need is a pair of scissors and an old t-shirt!:
Refashion Co-op: Celtic Knot T-Shirt Headband
DIY Knot Headband Tutorial - Simple Simon and Company
Gray floral top knot headband by turbansfortots on Etsy
Street Scene Vintage: Vintage DIY: 6 Easy and Quick DIY Projects You Need to Try!
DIY Nautical Knot Headbands From Old Shirts Pictures, Photos, and Images for Facebook, Tumblr, Pinterest, and Twitter
Keeping Up With The Morgans: DIY Top Knot Jersey Knit Headband
No Sew headbands! ADORABLE! I am SO making a bunch of these for my girls (and me!) Super cute and they look SO easy!
DIY: 50s Style Bowtie Headband
Fit knotted headbands. Useful for getting rid of those leftover pieces