ken

1

間 In Japan, ? –- 20th century, a unit of length = 6 shaku, approximately 1.818... meters (that is, exactly ²⁰/₁₁ meters), about 1.99 yards. It is the distance between support poles in traditional homes, and the length of a tatami mat.

United Nations, 1966.

2

In Thailand, a unit of length used only for measuring cloth, since the standardization of 1923 = 1 meter. Before 1923, 1 ken = 40 inches (about 1.01598 meter).