Gather tulle, elastic, scissors, and a measuring tape
Measure the waist
Cut the elastic to fit the waist snugly
Sew or tie the elastic ends together to form a waistband
Cut tulle strips to the desired skirt length, doubling the length for folding
Fold each tulle strip in half
Loop a folded strip around the elastic waistband
Pull the loose ends through the loop and tighten
Repeat with additional tulle strips until the waistband is full
Trim the bottom edge evenly
Adjust fullness and length as needed