Obsolete Russian units of measurement

A native system of weights and measures was used in Imperial Russia and after the Russian Revolution, but it was abandoned in 1924 when the Soviet Union adopted the metric system.

The Tatar system is very similar to the Russian one, but some names are different.

The system existed since ancient Rus', but under Peter the Great, the Russian units were redefined relative to the English system. Until Peter the Great the system also used Cyrillic numerals, and only in the 18th century did Peter the Great replace it with the Hindu-Arabic numeral system.

Length

The basic unit is the Russian cubit, called the arshin, which has been in use since the 16th century. It was standardized by Peter the Great in the 18th century to measure exactly twenty-eight English inches (71.12 cm). Thus, 80 vershoks = 20 piads = 5 arshins = 140 English inches (355.60 cm).

A piad (пядь, “palm”, “five”) or chetvert (че́тверть, “quarter”) is a hand span, the distance between ends of the spread thumb and index finger.