The PECHAM Extended XX-Large Mouse Pad is great, sleek, and is a necessity for comfortable sitting on a desk. The material also feels great to rest your wrists on.
Take a look at this great mouse pad below:
It is 780x300mm (30.7×11.8 inches) which is enough to sit under your keyboard and leave plenty of space for your mouse too, check it out on Amazon!
The Lost Digit 