Another matter to consider is if you intend to keep your hair straight or intend to curl it. Curls will make the hair appear shorter. How much shorter, will depend on the size of your curling iron. Please take this into consideration when deciding the length of the extensions.
As in this picture, the more curl or tighter the curl, the shorter the hair will appear. The straighter the hair, the longer it will appear.
If you are considering straight hair, the above information should be a good guide to help you decide on what length to choose.
