For length-wise fit, the widest part of your foot (ball of foot/where your toes connect to the rest of your foot) should be at the widest part of the shoe. This is the proper flex point of the shoe. So you should be sizing based off of your heel-to-ball of foot size, not heel to big toe. To put it another way, if your toes were to be chopped off, you'd still wear the same size shoe you did when you had them.
That's where I'm at. the big bone / ball of my foot is right at the widest part of the forefoot. The creases form just proximally of the tip of the wing's point which is pretty ideal.
What's funny is that I always thought I had long toes... But apparently someone has longer.