I travel a lot and don’t really like the warmth of pants in summer, and (especially in Europe) find shorts often inappropriate.  In searching for something comfortable yet easy to pack I happened on tiered skirts, preferably made of calcutta cloth.  Parenthetically, I thought this was sort of a standard, like denim, and would have ready availability, but recently have had difficulty finding it in various colors.  Anyhow, since the preferred tiered skirt for me (I’m 6’2″) is just above knee-length, I find about 1 1/2 yd to be about right, but am wondering if there isn’t a simple formula for determining how much fullness to figure for each tier, rather than the simple trial and error system I’ve stumbled on.  These really are terrific for summer travel as they go with all my tees and tank tops, and are so comfortable yet provide more modesty than even bermuda shorts, while still suitable for either touring or evenings.  Any suggestions or thoughts?