a mousepad is "un tapis de souris" in French.

One can purchase a costumized mousepad at a variety of online businesses. One can try Zazzle where you can create your own mousepad. One can also try Vistaprint which also offers to create your own mousepad.

Nope, no need for a mousepad if it is working fine already.

According to the Oxford Dictionary, the name mousepad has been tracked to the August 1983 of InfoWorld. Mousepad is a common term for a soft mat placed under mouses with rollers inside to help them move smoothly and help keep the insides cleaner.

It is standard sized.