Features: Effectively eliminate mouse hands. The three-dimensional arc-bionic armrest position makes every bend natural. Streamline-style,design for the right/left hand. Concave design, help you avoid the Mouse Hand. Little changes, all in the details, small changes to enjoy the for wisdom of life. It is better to use with vertical mouse. Specifications: Item: Wrist Rest Pad Material: Silicone Type: Left/Right Function: Ergonomic supports Mouse Pad Size: approx 99.5x42.9x18.2mm/3.92x1.69x0.72in Color: Black/ Gray Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement. Package includes: 1PC Mouse Pad