Mantaflow mesh refinement

Howdy,

Is there a way in Mantaflow to have the generated mesh closer to the scale of the simmed particles?
I seem to always get a much bigger mesh and if I tweak the Particle radius int he Mesh tab to be less than 1, then you actually get less mesh generation but not thinner.

Any guides would be a great help.
At the moment, the particle sim always looks great, but the mesh generation is where I struggle.
Is it just a matter of increasing resolution in the sim?

Thanks