Measuring for a Ladies Kilt
This is the starting point. Take your normal waist measurement, around the thinnest part.
This measurement should be halfway between the waist and seat (bottom).
Take the widest area across the bottom, and measure around, do not put the tape measure tight, this should be a fairly loose measurement.
Whilst kneeling on the floor and keeping your back upright. That is, not looking forward and down whilst taking the measurement, measure from the starting point to the floor. There is a temptation to lean forward to view the measurement but this causes an inaccurate length measurement.