Freakin' Sweet Knots allows you to design woven jewelry so you can have it 3D printed on demand. It can create a type of knot called a Turk's head in many different configurations. With just a few clicks you can create a unique ring perfectly sized to your finger. All 3D printing is handled through online printing services such as Shapeways, so all you need to do is design, upload and order! Give it a try!