Whatever length you choose is how long each individual strand of hair will be. So if you order a 20 inch wig, each strand (excluding baby hairs) will be 20 inches long.
Keep in mind what style of wig you are getting. If you choose a curly or kinky perm, remember that curly hair tightens up and will fall higher. For example, a 20" wig permed in the AMANDA style may only measure out to be 18 inches long if measured curly. But when pulling the curl straight, the strand will be 20 inches.
If you are planning to have your wig cut and styled with layers, or a shorter style into a "bob" make sure your order a length that is 2-3 inches longer than your final look. After you get your wig, you can take it to the salon and have your stylist add the perfect cut for your face.
