It is disposable, easy to use. It is a good tool for permanent makeup beginner. Easy to detect the eyebrows position, length and size, convenient and practical. Perfect for ensuring same length, shape and position of brows. How to Use: After cleansing forehead, stick it on forehead to help drawing balance and perfect eyebrows. When finish drawing, it can be simply peel off. Type: Eyebrow Tattoo Ruler Material: Plastic Quantity: 10Pcs Features: Easy to Use, Disposable, Eco-friendly Size: 18cm x 2.2cm/7.09" x 0.87 (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 3 x 10 x Eyebrow Tattoo Rulers