Ideal metric and ratio for v taper?

[makhachev]

I’m not sure if bidelt to waist circumference or bidelt to waist width is a better metric. And whichever metric is better, what is the ideal ratio for a perfect v taper?

 

[MountainSocrates]

Waist width to bidelt, you cant see someones frame from the side

 

[makhachev]

Waist width to bidelt, you cant see someones frame from the side

Ok but what would be the ideal ratio?

 

[MountainSocrates]

`1.4