Help - I'm confused. My wife asked here to help gathering these measurements for her sewing class, but I can't figure them out. The instructions list the points to mark, but the measurements don't correlate with the points. For example, how do I measure shoulder length? What's the definition of shoulder length? If I search the page for shoulder length, I only get a match on the measurement, not the instructions. What I need is something like the following

Shoulder Length (from the natural neckline side point (A.3) to the shoulder point (C) on the same side)_____________

Does this make sense? Am I being too literal? I'm a computer programmer, so I expect instructions to be 100% complete (like a computer program). Maybe that's too much to expect. Any help would be appreciated.