How to define the characteristic length (lc) for the extruded mesh?

Dear Community,

Using TOIGHIO, this code extrudes a 2D mesh into a 3D mesh along the y-axis.

mesh.points[:, [1, 2]] = mesh.points[:, [2, 1]]
mesh.extrude_to_3d(height=100, axis=1,inplace=True)

How can I define a characteristic length (lc - mesh size) for the extruded mesh?

Thank you in advance