The best size, keyboard wrist rest 17.7 X 3.4 X 0.78 inches and mouse pad with wrist rest 9.84 X 9.05 X 0.78 inches can perfectly fit most keyboard, mouse and palm sizes.$Ergonomically designed, it is easy to type and relieve pain. This keyboard wrist rest and mouse wrist rest pad set has an ergonomic outline to keep your wrist well supported during long hours of work and games.$Its non-slip backing can hold the liner firmly in place to prevent slipping during use. Provides a soothing and relaxing feeling when typing, releases accumulated tension, and aims to prevent wrist or hand injuries$Non-slip rubber base, the back of this wrist support kit is thickened with textured rubber material, which can provide a heavy grip and prevent the keyboard and mouse pad from sliding or unnecessary movement during typing.$Double sticking and crimping treatment, provide a smooth and smooth edge, will not roll up or split