Best Answer: Normal paper could be any size you want it to be. But sheets and tablets are most often sold in a large variety of standard sizes, depending on it's use. So, I have to say that there IS NO, single normal size piece of paper. However, what most people might consider the most common size of paper would be the standard letter sized sheet, which, in the US, is 8 1/2 inches by 11 inches. This is the size binder paper and copy paper is typically made.