A tiny watch,with a huge personality The watch I have worn very often for many years is 40mm in diameter. And I find it perfect, well-balanced and well-fitted on my wrist. I have also tried and worn 42mm or even 44mm models and I liked them a lot. I can honestly say that, as far as they are well designed, with a good “architecture”, they are not too big or ill-suited even on a thin wrist such as mine.