I bought it because the mechanism on one I already had broke, and I wanted to replace only the mechanism.

It says 120 cm in diameter, but I didn't notice the length of the hands.
My clock is 95 cm in diameter. The hands are so small that if you're a little off to the side, you simply can't see them; you can't tell the time. They're not visible.
It does the job if you want to make a small clock up to 60 cm, but there's no way you should stick it on one with a diameter of over 60 to 70 cm. If you make it bigger, it looks very funny, with its tiny hands trying to tell the time.

The stars are because of the misleading description claiming a 120 cm clock. It's nowhere near that big, not even as a joke, and the proportions of its parts have nothing to do with what the photo here shows. Otherwise, it works just fine; it's one of the typical wall clocks.

Someone else in the comments says it's huge, and the photo they posted does indeed prove it. It looks as if they received a different clock from the one that arrived for me.