I asked a similar questions a few weeks ago. The thread is at.

http://www.xmarksthescot.com/forum/s...ad.php?t=24339

Remember when measuring that the front apron will be hanging straight down from the navel area. If when you measure your rump the tape measure is behind the navel you need to adjust for this difference. My thought and the actual kilt makers will probably have a better method, is to face a wall, walk into the wall (very slowly) stop when you just touch. Now when you measure your rump does the front of the tape touch the wall? If not you will have to add some extra inches to get the hang, and taper right. How much I don't have enough experience to say.