You really need to try one to be sure. I wear a Sinn 142 which is bigger (44mm v 41mm diameter) with 18cm wrists and it's a good fit in my opinion (and lack of lugs like the 144 means it wears smaller in my mind)
The possible bigger challenge might be the height of the watch. 14.5mm sits quite high on the wrist (comparatively). Best bet would be to find one to try out.