Archimedes' world size
Mathematical model of Archimedes' descriptions in the Sandreckoner featuring Aristarchos' world size.
Moving the m slider to its rightmost position will show the Sun and the Earth (not the Moon) about as big as Aristarchos would likely have imagined them.
Moving the s slider to a value between 18 and 20 gives a mean solar distance of 1146 Earth-radii, which is an important Aristarchan number.