Look at the length and quantity of your hair. Since it is medium and long hair, it is recommended to use 28. In fact, the difference between the two is not too big, but if the hair is not curly enough, it will appear very short. Suitable for hair and waist. In addition, it depends on the delivery. If you send less, it is recommended to use 28, and if you send too much, it is recommended to use 32.