This is a Worm Edging done on a knitting loom, Also known as Pie Crust Edging. Simple and easy to do and looks great on hats, scarves, afghans and blankets.
by Ultimate Paper Hats
by Valena DIY
by LoomaHat.com
by missionboundcreation
by Loom Knitting with Joanna
by HowtoDrawAndPaint
by StyleKitty