Use at least 2 strands to make this knot. Form a loop with the ends (Figure 1). Thread the tail behind and back through the loop. As you tighten the knot, use your finger or a crochet hook to slide it into position (Figure 2).
The overhand knot is the basic knot for tying off thread: Make a loop with the stringing material. Pass the cord that lies behind the loop over the front cord then through the loop and pull snug.