Need to Know. Early 5-dollar bills are what is known as "large notes." They measured about 7.42 by 3.1 inches, and people even gave them the nickname "horse blankets" because of their size.

And here's why. These unique dollar bills are called 'solid or near solid' in which the serial numbers digits are all identical. And only about one out of every 11 million notes is a solid. Anyone ...