JanieH

In the video the instructor says to measure to your elbow. I find that is just too short for me and I get frustrated having to rethread so frequently. Another video I watched said to cut at 36 in. and fold, and another said cut at 18 inches. So my advice on length of thread: play around with it until you find the length that you work with the best. I would start with the shortest one (to elbow) and gradually increase by 2 - 4" until you get to the point where you say, "Oops, this is too long". Sort of like Goldilocks finding her length of thread that is "just right".
Have fun - I love to embroider.