When you’re in a hurry, the number eight haircut length is perfect. The hair on top of this style is longer than the sides and back, so the length on the top is shorter than the sides and back. This type of haircut gives that a tapered and sleek look. The hair on the back and sides is shorter than the top, giving it a more wavy appearance. Combined with tights, the number eight length creates a fun and flirty look.