Hello again! One more thought - for the skirt, it looks like double or triple circles, perhaps diminishing in fullness as the layers go inwards. To cut the double or triple circles, you divide the waist by however many (2, 3, whatever), then make make up the appropriate number of pieces.

So for a double circle, divide the waist by 2 and use that measurement as the inner circumference of the circle pieces. Depending on the width of the fabric, cut 4 half circle pieces or 8 quarter circles to make up the full waist circumference. For a triple circle, divide waist by 3 and cut 6 or 12 pieces; for 1.5 circles, divide waist by 1.5 and cut 3 or 6. Hope that makes sense!