A lessa was a customary unit of area used in the Indian state of Manipur and neighbouring regions. After metrication in the mid-20th century, the unit became obsolete.
The conversion of the lessa is still debated to this day.
Web site: Arunachal Pradesh land records . 2007-01-20 . Department of Land Resources, Government of India . dead . https://web.archive.org/web/20060617120416/http://dolr.nic.in/hyperlink/NE-states/NE.html . 2006-06-17 .