# What does 16 penny nail mean?

**penny**, so 8d refers to an 8-

**penny nail**, 16d to a

**16**-

**penny nail**and so on. Some say a hundred 3-1/2 inch

**nails would**have cost

**16 pennies**and thus became known as

**16**-

**penny nails**. Others say that the number and the “d” indicate that one 16d (3-1/2 inch) hand-forged

**nail**cost

**16 pennies**.

Then, what gauge is a 16 penny nail?

**Nail** Measurement Guide: 2d to 16d 4d **nails** measure 1.5 inches and 5d **nails** measure 1.75. A 6d **nail** is 2 inches long and an 8d **nail** is 2.5 inches long. 12d **nails** are 3.25 inches long and 16d **nails** (**16 penny**) are 3.5 inches long. The **nail size** chart below shows how they stack up against each other.

**inches**long. Note: The "d" means "penny." For example, a 10d nail is a 10-penny nail.

In this way, what does a penny nail mean?

The term "**penny**", used with **nails**, was an English measurement originally **meaning** price per 100. It now **means nail** length and is abbreviated "d" from the old Roman "**penny**" the denarius. Under the original measurement, 6d **nails** cost 6 pence per 100. A 60d **nail**, being much heavier, cost 60 pence per 100.

An 8d **nail**, for example, cost 8 pennies for 100. Today, the penny system refers specifically to **nail length**. A 2d **nail** is 1 inch long, for example, while a 16d **nail** is 3 1/2 inches long. Each higher number in the penny system represents a 1/4-inch **length** increase, up to a 12d **nail** (3 1/4 inches long).