I got Qs on how to estimate the length of the tiers, this is how I do it:
The measurement of each tiers can be concluded as number of tiers times the length of the first tier (nA).Note that this is only for one side. For full skirt you need to sew two sides.
The skirt is actually self draft and since I am using ruffler, estimation of the tiers length must be accurate or else, I ended up like this:
Terpaksa bertampung kain sebab salah percaturan.. Heheheheh.. (lucky the fabric is black so not that obvious.. huhuh)