How to measure rise for longies?

[Mommy2Haley]

I'm working on longies for the new baby and all of a sudden I'm struck with fear -- how do I measure rise?

I made a few pair for my daughter when she was younger but all of a sudden I can't remember how to do it.

Is it waistband to crotch? Waistband in front to crotch back to waistband in the back? Is it from the bottom of the waistband to crotch? Oye, my head is spinning.

TIA!

[sonuptosondown]

This is how I do it:

For longies, put typical diaper on baby and then measure from bellybutton, down through crotch and up again to about bellybutton height in back. That measurement is the rise.