We buy 200g (table, in tub) and 250g (cooking, as slab, with wrapper measure) but it looks like there's a wide variety https://www.coop.ch/fr/nourriture/produits-laitiers-oeufs/be... of which I'd say the other I most commonly see are 15g (single service).
Yeah, in the Netherlands it is almost exclusively 250g bricks (excepting tubs for spreadable butter blends and margarine of course). Variations exist mainly for high end butter and bulk packaging.
Edit: looks like you all have more than 250g and 500g, but not as much more: https://www.ah.nl/producten/zuivel-eieren/boter