Double sides design:Each practice artificial skin measures 20*15cm,thick enough for double sided usages, it can clearly show what your have drawn, support to trace your drawing and lining. Realistic touch:these double sided practice contain a surface and edges, can enhance the better skin tactility and bring you a realistic tattooing experience, their blank and surface allow you to design your favorite eyebrow shape and practice different techniques from outlining to shading. :20Pcs Colour:As Shown Material:Silica gel Size:20x15cm,Thickness 0.1mm Package Contents: 20 * Silicone Thick Practice Only the above package content, other products are not included. Note: Light reflection 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.