[Nomos]Is it too big for me?

I have a 15cm wrist and I'm looking for something as my first 'serious' watch from Nomos. Their latest club sport model is 34 size and this is how it looks like on me. It is too big for me? At the first sight with original steel belt, to be honest, I feel it looks not very coherent on me. But with leather one it looks better(?). P.s. I'm 165cm, 55kg. My style is often casual and sporty. Any suggestion is appreciated!