My wrist is about a touch less than 17cm.
I have been trying to decide between:
a Grande, (rose gold case, automatic) which is perfectly comfortable, and
a Grande XL (stainless hebdomadaire movement, black dial blue accents), which fits less well than the automatic, due to its overall length. The XL comes with a stainless bracelet, which helps. The movement is the real plus.
Think happy thoughts,
Chk