A yojana (Devanagari: योजन; Khmer language: យោជន៍; Thai: โยชน์; Burmese: ယူဇနာ) is a measure of distance that was used in ancient India, Cambodia, Thailand and Myanmar. Some sources defining the unit as the distance an army can march in a day. Various textual sources from ancient India define Yojana as ranging from 3.5 to 15 km.

Ashoka, in his Major Rock Edict No.13, gives a distance of 600 yojanas between the Maurya empire, and "where the Yona king named Antiyoga (is ruling)", identified as King Antiochus II Theos, whose capital was Babylon. A range of estimates, for the length of a yojana, based on the ~2,000 km from Baghdad to Kandahar, on the eastern border of the empire, to the ~4,000 km to the Capital at Patna, have been offered by historians.

....And this (conquest) has been won repeatedly by Devanampriya both [here] and among all (his) borderers, even as far as at (the distance of) six hundred yojanas where the Yona king named Antiyoga (is ruling), and beyond this Antiyoga, (where) four kings (are ruling), (viz, the king) named Tulamaya, (the king) named Antekina, (the king) named Maka, (and the king) named Alikyashudala, (and) likewise towards the south, (where) the Cholas and Pandyas (are ruling), as far as Tamraparni.

— 13th Major Rock Edict. Translation by E. Hultzsch (1857–1927).

Offers:

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The Moon is handed down by memory to be eleven thousand yojanas in diameter. Its peripheral circle happens to be thirty three thousand yojanas when calculated.
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The Sun is eight thousand yojanas and another two thousand yojanas in diameter. From that its peripheral circle comes to be equal to thirty thousand yojanas.

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