ponyo size details

If your hair is smaller than the size of a golf ball when you gather it together then the best sizes are the classic PONY-O for all your hair together and the PONY 2.0 for sections.
If your hair is larger than the size of a golf ball when you gather it together you will want the PONY-O XL for all your hair together and the XLS for sections.
If you are not sure get the larger sizes to be safe.