What tile size is ideal for the bathroom?

A dealer showed me floor tiles for the bathroom, toilet, hallway, kitchen, utility room, as well as wall tiles for the bathroom, which I liked. But they are very large:

Floor: 60 x 60 cm (25,-- €/sqm), R 10 AB; thickness: 10.5 mm
Bathroom wall: 42.5 x 119.2 cm (48,-- €/sqm); thickness: 10.5 mm

Advantage:
- square tiles do not have such a lengthening effect in a narrow hallway
- large wall tiles especially in the shower --> fewer joints --> fewer problems with dirty joints

Are there also disadvantages?

More expensive in installation

The tiles are not particularly large. 60x60 is almost normal already.

The 60 times 30. At 22 per sqm.

We are currently getting 120x120cm for floors and walls. I don't see a disadvantage with large formats, the fewer joints the better
Edit: One "disadvantage": you have to put more thought into the laying pattern.

The only disadvantage is the price. That is really expensive compared to our little ones.