Answer:
4.Nail Measurement Guide: 2d to 16d
A 2d nail is 1 inch long and a 3d nail is 1.25 inches long. 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.
It was associated with nails when they were hand-forged, one at a time. 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.
Explanation:
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