The clay tablet measures approximately 9 by 7 centimeters.

Evidence

It comes from what is now southern Iraq, and it’s on a little clay tablet, about 9 centimetres by 7 (4 inches by 3) – almost exactly the same shape and size as the mouse that controls your computer. — Neil MacGregor, A History of the World in 100 Objects, 260

Categorization

• corroborated: 2 independent passages support this claim — Neil MacGregor, A History of the World in 100 Objects, 260