Source: https://science.nasa.gov/jupiter/jupiter-moons
Title: Jupiter Moons
Selected source excerpts (not the complete document).

Io is Jupiter's third largest moon, and the most volcanically active world in our solar system.

Europa is Jupiter's fourth largest moon. It's about 90% the size of Earth’s Moon.

Ganymede is Jupiter's largest moon, and the largest moon in our solar system. It's even bigger than Mercury, and Pluto.

Callisto is Jupiter’s second largest moon and the third largest moon in our solar system.
