Looking for natural-looking extra volume for thin or fine hair? Try our 18" natural finish human-hair Clip-in Hair Extensions. Containing hairs of different lengths, achieve a stylish layered volume boost and additional length to enhance your own hair effortlessly. One pack is usually enough for a full head, but if you have thicker hair, 1-2 packs will help your hair look more natural and blend better. Alternatively, you can opt for our thicker 20" Clip-In Hair Extensions for a more luxurious finish.