The average particle size (radius) for Saturn's Rings is between 2 to 12 meters, with a likely minimum particle size of 1 to 10 cm and a maximum particle size of 10 to 20 metres. Saturn's Rings contain relatively little dust. They are mostly car to truck sized.
>Although detailed models of the size distribution in Saturn’s
rings below a radius of 1 cm are lacking, several lines of evidence
suggest that—at least in the main A, B, and C rings—very little
of the total surface area is accounted for by such particles.
So most particle are >1cm.
Here's an excerpt from the conclusions of the paper...
>>With the exception of the Cassini Division, where
our results are the least well-constrained, the effective radii agree
to within ∼30%. Both studies find that aeff ' 2 m in the C Ring,
∼8 m in the inner B Ring, and 8–12 m in the inner A Ring.
I not sure about distance. Though this could be inferred via predictions of density and frequency of collisions.
French, R.G. and Nicholson, P.D., 2000. Saturn's rings II: Particle sizes inferred from stellar occultation data. Icarus, 145(2), pp.502-523
If we consider object with radius *r* between 1 cm and 1.2 m, the number of objects per unit area per unit radius is very close to a power law *n*(*r*) = *D* (*r*/ 1cm)^-p with power *p*~3.2 and *D*~5 x 10^3 .
For objects of radius between 10 cm and 1 m (i.e., between a volleyball and a beach ball), the total number density is roughly 10^-2 per square meter, or about 50 over a football field. Depending on the ring thickness, which gets a small as a few meters, this is pretty dense. If you were floating around in the rings, they would be separated by about 10 meters.