These are 4 x 3 x 0.185 inches. Repositionable silicone wrist rests for Apple MacBooks, laptops, notebooks, ultrabooks, chromebooks, and netbooks. We make these in 2 sizes now, since Apple increased the size of the trackpad in the new MacBook 12 and the MacBook Pro 13 we now offer a small and standard size. The small size is for the new MacBook 12, new MacBook Pro 13.
Please be sure to measure the palm rest area of our laptop before ordering! If you have any questions just send us a note or call and we can help you get fit with the correct size. These if older MacBooks, MacBook Air's, Dell, Toshiba, Samsung, Sony and Lenovo notebooks and laptops.