We report on an idealized three-dimensional model of Saturn's magnetopause. Using the subsolar point distance R0=24 RS, we provide an analytical parameterization of the magnetopause model described by Maurice and Engle [1995>. This representation of Saturn's magnetopause is consistent with Voyager 1 magnetopause crossing observations. The magnetopause shape is then scaled to 17 RS≤R0≤45 RS and applied to Pioneer 11 and Voyager 2 observations. Results highlight variations of R0 during magnetopause crossings (over a few hours) and/or between inbound and outbound crossings (over a few days). Finally, we extend the parameterization of Saturn's magnetopause to nonzero dipole tilt angles. The model is intended for use in support of the Cassini mission. ¿ American Geophysical Union 1996