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# What are the little lines on a ruler?

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The little lines on a metric ruler mark the millimeters between centimeters, while the little lines on an English ruler mark the eighths and 16ths between inches. Some English rulers may only have lines at every 1/2 inch or 1/4 inch.

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To measure using a metric ruler, a person counts the number of marks after the last full centimeter measured. For example, if six marks are counted after centimeter 2, then the measurement taken is 2.6 centimeters.

An English ruler requires knowledge of the different fractions. Every inch is marked by a larger line and a number. The 1/2 inch is the center line between two set inches, and the 1/4 inch is the center line between two set 1/2 inches. The smallest lines are typically an 1/8 inch or 1/16 inch. Example measurements on an English ruler include 4 1/2, 6 3/8 and 9 7/16.

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## Related Questions

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To use a ruler to measure ring size, wrap a string around the ring finger and make a mark at the point where the string meets, and then measure the distance between the marks with the ruler. The length between the mark should be measured in inches and then compared to a ring size chart to determine its ring size equivalent.

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Five-eighths inch on a ruler is a mark past 1/2 inch and before 1 inch. If the ruler divides the inches into eighths, 5/8 inch is the fifth mark on the ruler from the left side. If the ruler divides the inches into 16ths, it is the 10th mark.

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Coordinate plane graph paper is standard graph paper or paper imprinted with horizontal and vertical lines at equal intervals to form a grid that generally depicts four quadrants. The horizontal and vertical axes of the grid represents possible values for variables labeled x and y.