Outdoor stairs to the front door tiling: patterns and tile size

Hello everyone, I want to tile my stairs and am faced with the question of which laying pattern and especially which tile size. Currently, 30x30 tiles are installed, but there are only few options or the selection is small. 60x30 is standard and there is the largest selection, but I am not sure how well that will look. The problem is, the step is 42 cm deep. So I would need a little more than 1 tile if I lay them crosswise. 60x60 would be better there, but again, on the top level where the door is, not quite optimal. The staircase is 151.5 cm wide and 0.73 m deep, or with the recess 0.92 m. Does anyone perhaps have an idea what the best tile size and laying pattern would be here? I am attaching a picture of the stairs.

The thing is ideal for a granite slab in one piece. Above all, it also lifts then.