Hi, in the box I received, there are 3 different size tips (so 3x2 in total).
Digitec don't seem to be selling replacement tips for this model yet, but that may happen soon.
If not, various other sites already sell them, as I was able to find quickly on the internet.

yes, there are 3 different sizes in total... one is of course already on the headphones.
The ear tips are well hidden under the sheathing of the supplied USB C cable... easy to overlook.