I had to look it up because I hardly ever actually buy mayonnaise, but I’ve walked down the mayonnaise aisle at the supermarket… What’s funny is that your 600g “50% more: American size” is actually a tweener size here.
The standard small jar here is 15 Floz (about 400g; we sell mayo by volume here apparently). The standard large jar is double that. And of course we have less common, but not uncommon, 48 Floz for “family size” and larger still in bulk.
We do have containers that are between or smaller, but the those are usually specialty containers (mainly squeeze bottles), specialty types (such as avocado oil based or flavored/blends), or just less common in general.