In the United States surveying system, a "link" is a unit of length that is equal to 1/100th of a chain. Each link is approximately 7.92 inches long or about 0.201168 meters. This unit is primarily used in surveying and land measurement in the United States.
Surveyors often use a chain, which is comprised of 100 links, to measure distances in land surveys. The use of links and chains allows for precise measurements of land parcels, boundaries, and property lines.
A "fingerbreadth" is a unit of length that is approximately equal to the width of an adult human finger. It is often used informally and in various historical and cultural contexts as a convenient way to estimate small lengths or distances. The actual measurement of a fingerbreadth can vary somewhat depending on the size of an individual's finger, but it is typically around 1 inch (about 2.54 centimeters) or slightly less.
In some historical systems of measurement, particularly in ancient cultures, the fingerbreadth was used as a standardized unit for measuring length. It was one of the smaller units within a larger system of measurement, often used for small-scale applications like measuring the dimensions of objects, architectural details, or jewelry.
While the fingerbreadth is not a commonly used unit of measurement in modern times, it remains a useful and intuitive way to approximate small lengths informally, especially when a quick estimate is needed.