Minimum element size

Set the lower size control passed to the mesher.

Location

Mesh → Free Tetrahedral → Size → Minimum element size

Initial value: auto.

Enter a length in compatible units, converted to metres, or use auto. For a named preset, auto derives this value as a fraction of the maximum size. It is a meshing control, not a guarantee that small geometric details or poor-quality elements are absent.

Using the value

Keep this no larger than Maximum element size and inspect narrow gaps after Build Mesh.

Troubleshooting

A minimum that is too large can suppress needed resolution; a very small minimum can greatly increase mesh cost. Check units and geometry scale.