How much gas does a typical planetary nebula contain?

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Planetary nebula Southern Ring Nebula as captured by the James Webb Space Telescope in the near-infrared (left) and the mid-infrared (right). The dimmer star at the center of this scene has been sending out rings of gas and dust for thousands of years in all directions. The Southern Ring Nebula is approximately 2,500 light-years away.

A typical planetary nebula contains approximately 0.3 solar masses of gas. These objects are relatively small, with a radius typically measuring about one light-year. Over time, as the nebula expands and its density decreases, the gas eventually mingles with the surrounding interstellar medium.123