Gigameter (Gm): A gigameter is equal to one billion (10^9) meters. It is used for long-distance measurements, such as the size of celestial objects or interplanetary distances.
A "finger" is a traditional unit of length used for measuring cloth or fabric. Similar to the span, the finger is based on the width of a human finger. It was historically used in various countries, including England.
In England, a finger was typically equal to about 2.25 inches or approximately 5.715 centimeters. However, like other traditional units of measurement, the precise length of a finger could vary depending on the region and historical context.