Hello, with OSM at least if I zoom in all the way the plane/heli icon is not scaling properly. Only testing now with helis but reporting just in case.

LNM uses the reported aircraft size when on ground. You can see it in the dock window "Simulator Aircraft" on tab "Aircraft" under "Wingspan".
To be more precise I check the simulation variables "Visual Model Radius" and "Wing Span" from SimConnect.

This is an add-on issue if the other aircraft look ok. I'd contact the developer of the add-on.

Alex