Choosing the right length can be tricky sometimes. Most of the Jon Renau Toppers are available in 8″, 12″ or 18″. Some are available in all 3 lengths. This great video is supplied by Jon Renau showing how simple it is to match your length.
Hairdressers can always customise it a little to suit your style. Always check with your hairdresser if they have experience with alternative hair.