Dimension of keyboard wrist rest: 18.2 x 3.15 inch; dimension of mousepad: 9.5 x 8.2 inch; dimension of coaster: 3.9 inch (diameter). Fits all mouse and keyboard. This mousepad set will be compatible with MacBook / Notebook / Chromebook / Ultrabook / Desktop / PC, also compatible with iMac. Ergonomically designed with breathable/durable neoprene cloth and raised memory foam. Efficient for easy typing & pain relief. Offers soft support to relieve pressure and pain of your wrist, keep your wrist in a natural and comfortable state.