Creating a curve from edge (around) of a mesh object

Struggling again, please help :slight_smile:

OK pic.1 I am trying to create (extrude?) a line (curve) around the edge of this mesh object.

Picture 2 shows it, however it was done in different software and imported to Rhino.

Is there any quick way of doing it ?

Pic.1

Pic2.

OMG, I just founded, DupBorder, lol sorry for spam.

2 Likes