Mesh Size
Mesh size can be roughly equated to the edge length of the elements generated by the mesh generator.
The Mesh size can be either an Absolute value or a Relative value. An Absolute value is the actual size of the elements requested. A Relative value, on the other hand, sets the mesh size by multiplying the maximum edge length of the bounding box of the corresponding geometric entity with the relative value entered. Subsequent sections will demonstrate these settings with examples.