Saturn is significantly larger than Mercury. Here's a breakdown of their size comparison:

* Saturn:

* Diameter: 120,536 km (74,898 miles)

* Mass: 5.683 × 10^26 kg

* Mercury:

* Diameter: 4,880 km (3,032 miles)

* Mass: 3.30 × 10^23 kg

Saturn is about 9.5 times wider than Mercury and about 171 times more massive. You could fit about 760 Mercuries inside Saturn!

This means Saturn is a gas giant, while Mercury is a rocky planet.