(1) What is Headrang? Headrang is home face correction device for V-line face line. (2) What are the effects of Headrang? 1) Turns jaw bone and cheekbones to become V-line face and oppresses growth About 2-3% of already grown bone is flexible with external pressure. In particular, the lower jaw bone is flexible up to 6%. Based on such flexibility of bones, continuous pressure on wide or protruding bones using Headrang may change the face gradually become V-line or correct the face line. 2) Correcting asymmetry face Headrang gives uniform strength and symmetry between left and right which the pressure affects forward direction. Thus, it corrects protruding or dent parts or unbalanced face to make it look symmetry. 3) Reducing the volume of cheek flesh, cheekbone flesh, masseter Headrang induces reform of cell tissue through continuous pressure on the face and reduces volume of cheek and cheekbone flesh to make the face look smaller. (3) Sizes Headrang is unisex product. Select the size after measuring your width of face (length of chin or side cheekbones). Size S: 13cm or shorter, small face or children Size M: 13.1~15.5cm, normal size face Size L: 15.6cm or longer, large face (4) How to measure width of face (see the figure) Stand two books boxes on a flat table. Put your face between them as your skin is a little bit pressed. Remove your face and measure the length with a ruler.