Have the person try on the tutu to make sure the length is correct and it is easy to move or dance in. Add ribbon by tying them or gluing them onto the elastic. If you want to add buttons, flowers, or other embellishments, simply pin them onto the tutu or onto the elastic.

TL;DR in Chinese:
检查裙子是否合身。 最后用缎带或者花朵装饰蓬蓬裙。