I should start making some of these for the summer.
make waistbands 1.5X the waist measurement. Then each tier is double the tier above it. Each tier is 10cm wide x 3 tiers + the waistband/yoke:.
eg. waiste measurement 50cm
waistband 20cmX75cm (this will be folded in half lengthwise.).
can work with 75cmX10cm strips: tier1 two strips, tier2 four and tier3 eight