Planar Transformer

[der.ule]

I believe a way to go would be to use StepUp to generate a couple of footprints with the desired dimensions:

KiCad StepUp: The Sketcher for Footprint generation

Hi, I’ve found some time to prepare a mini tutorial on generating a kicad footprint from a 3D manufacturer model… The video shows how to create a footprint using a manufacturer 3D STEP model where are also included Pad outlines. With StepUp the process can be quite easy and the result would be less prone to errors. [generating a kicad footprint from a 3D STEP model] Requirements: FreeCAD 0.17, which is now the new stable release!

Stepup Generated Footprint - Incorrect Copper

I found nothing wrong with your file. I created a look-alike file and had similar problem. That leads me to confirm by opinion about plugins in open-source programs… An alternate two-minute approach is to: • Draw the shape with transparent background in a Graphic program, save it as .PNG. • Open Kicad’s Bitmap Converter (the icon at top of main panel) Set export to pcbnew and user_eco layer. It exports a .mod file. • In PCBnew, Add/place a footprint and select your new .mod file • Doub…

Or use Spiki, I have read good things about it:

GitHub - in3otd/spiki: A spiral inductor footprint generator for Kicad