Which is an object that is 10 inches long?

A standard ruler is an object that is typically 12 inches long, but you can find 10-inch rulers as well. Additionally, a standard sheet of paper (letter size) measures 11 inches by 8.5 inches, so if you cut it down to 10 inches in length, it becomes a 10-inch object. Other examples include certain kitchen cutting boards and some types of books.