I just had a revelation of sorts!
In the past when I have measured myself, it was usually NBP. I would usually hit 6.25 inches or 6.5 on a good day. Now I have measured BP before and on those occasions, I measured 7 inches. On the times I have measured with a tape measure so that it would follow the curve, I measured 6.5 NBP pretty easily. This got me to thinking about what it would be if I did a BP measurement with a tape measure to follow the curve. I haven’t actually done this, but based on the results with the ruler, it ought to be 7.25-7.5! If it is true that the fat pad compresses pretty easily, then I already have little to worry about in the length department. I feel a lot better now!