1.Disposable ,soft and easy to use , After cleaning the forehead , slowly on ,That will not down , great tool for both professional Tattoos Stylists and painting eyebrow beginners 2.It unique designed to paint the most suitable eyebrow shape.It also can be more accurate for those who are in the beginning of the permanent makeup 3.Compared with others ruler, this sticker is Disposable, more accurate ,so much easier to use than the hard caliper rulers or Protractor ,Very effective in shaping and measuring brows.Good for accurate measurement and symmetrical marking 4..How to use: After cleaning forehead, then on forehead to assist drawing balance and perfect eyebrows. When finish drawing, it can be simply off ,It doesn't hurt at all Description Material: Pastic Color: transparent Size: length of about 18cm, width of 2.2cm Package Contents: 100* tattoo eyebrow ruler Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.