Microblading Silicone Lip Tattoo Practice Skin, Training Skin for Beginners and Experienced Tattoo Artists, WhiteSize: about 75mm wide, 50mm long, 25mm thick.â Material: The tattoo practice skin is made of good quality silione, flexible & soft, and has a similar feel as human skins, easy to color and easy to wipe off. â Usage: The 3D silicone lip is used to practice lip tattooing technique for tattoo beginners or experienced tattoo artists; or you can also use them to test out tattoo effect before they are applied to your clients.