You will notice on the Internet that no chart defines the lengths in the same way. It is almost impossible to give a precise idea of what a length can represent. Everything depends on its own morphology, the type of wick (stiff, curly, curly …) and the way they will be asked. The length of the locks is indicated in inches (US unit of measurement), and then converted to centimeters. Here are illustrations of what it could look like next if the hair is stiff or curly. These are examples calculated from the top of the head. You should also know that the length sold is the stretched hair, looping or curling does not count. The best is still to refer to the model of presentation of each wick where the length used was mentioned as often as possible.