Wrist and sizing advice

Hi!

Current 735xt owner, looking to move to either 945 or a Fenix 6 of some description.  I'm wondering what I can 'get away with' though in terms of my wrist size, which is 16cm.  I've attached some photos to help show this.  

It's hard finding anywhere local to me which stocks the 945 or Fenix 6, but will keep hunting!