It depends on your project. Our best selling rope is the 5mm 3-ply twisted cotton rope. We love it because it is easy to work with, is extremely strong and durable, and unravels at the ends to make a really lovely fringe.
Our string is another great material. It is a bit less sturdy than the rope, so you might not want to make furniture out of it, but this material is much softer on the hands. Our string is also great for other crafts such as knitting, weaving, jewelry making, and more.
In our upcoming book, we differentiate ropes as being the material before it is cut, and cords as the material after it is cut, as in your «working cords» or «filler cords» for when you are making your project. Otherwise it is just up to you what you want to call it!