They are too tall for home use.
Genelec makes stand mounting plates #8020-408, specifically for my 8020s. So be sure to get the correct plate for your model. The center mounting hole is 3/8ths. But it's a BSW (British Standard Whitworth) thread. Supposedly compatible with UNC for all widths except 1/2 inch. And it may fit but wouldn't be guaranteed spec'd as stable. So you need either Genelec stands or any that has a 3/8" BSW male threaded bolt. Genelec stand bolt is 20mm max length so plate can be screwed tight but doesn't touch bottom of monitor. Any stand bolt or adapter to a different stand needs to be 20mm max length too.
The thread pitch is different so it wouldn't be good enough for me even if it did fit. Screw it down enough and it could get thread bound and locked up. Then stripped when forced loose.
The plates have 4 prongs for mating with the underside holes of the rubber isolation base that comes standard with the monitors. That holds it from falling off whatever stand you use.
BSW was a standard goin back to old school British camera and video industry gear that somehow persisted internationally before there was any other standard for such. Presumably that's why Genelec chose it. They also use BSW on their stands male mounting bolt threads.
Hope this helps.