The stand that I built for myself measures 100mm H x 200mm D, 200mm W. Thickness of each leg is 35mm with an arch radius cutout of 75mm. These are the default parameters included in the .f3d file, which you can adjust as-needed.
Resizing:
Download the .f3d file and open in Fusion.
On the Solid Body editing tab select the “MODIFY” drop down menu and then “Change Parameters”.
Within the Parameters menu you can adjust:
Height
Depth
Width (see the note in the parameters window about overall width)
Thickness of the legs
Radius of the arch cutout
On the File menu, select “Export…”
I typically use .step files, but .stl or .3mf should work fine as well.
Printing:
I've included a .3mf file that contains the settings I used. If you choose to resize the stand (see instructions below):