At the time of death, the soul leaves this body behind. This body can be obtained by human being by practicing yoga, meditation, etc. With this body one can transform his body into a very small or a large size. The heavenly beings and hellish beings possess this body by birth. This body is possessed by some special souls.
Aharac body is very small in size.
These souls put on this body to travel far distant places. It is said that Acharya Shri Kunda Kunda possessed Aharac body. With this body he visited Shri Srimandhar Swami, the present Tirthankara of the Mahavideha Kshetra. He removed his doubt about soul and matter substances. This body is made up of Tejas vargna.