Things you will need :
Fine silk or nylon tulle
FabricMeasure the waist and side length from waist to just below the knee.
Cut a piece of wide ribbon to the length of the waist measurement, plus 1 1/2 inches. Attach two snaps on each end, the ribbon should fit snugly but not too tightly around the waist.
Multiply the waist dimension by 3. This is the width of tulle you need to gather to create sufficient fullness for this tutu
Cut enough tulle for the length of the waist to below-the-knee measurement to create three full layers.
Stitch each layer up the center back to within 6 inches of the top edge.
Run a gathering or basting stitch through all three layers and gather them to fit the ribbon waist band. You can run another basting stitch through the gathered layers to stabilize them before you stitch them to the waistband.
Top stitch the layers of tulle to the wrong side of the waist band, allowing for a small overlap at the center back closure.