Optimal Size 3 in 1 SetKeyboard wrist rest pad measures 17.33 in x 3.35 in x 0.98 in, mouse pad support 9.85 in x 8.66 in x 0.98 in, and the cup coaster is 3.9 in x 3.9 in. This is a keyboard and mouse rest combo that will perfect fit all kinds of mouses or desks, maximum helps you ease your hands wrist pain or fatigue by providing you soothing sensation and relaxation, prevent muscle nervous or wrist injuries. Fatigue-free Typing DesignThis keyboard wrist rest and mouse wrist rest pad set is contoured ergonomically to keep the wrist well supported for 0. 98inch(25mm) higher while working and gaming for long periods of time. Perfect wrist & hand fatigue reliever for workers, gamers, writers, editors who are engaged at long typing work.