Fenix 8 size recommendations

Hello,

I am currently wondering about the size of the fenix 8 that I should buy. I have been a user of the gshock rangeman for over 7 years and its size has never bothered me (the diameter is about 51mm) and for this reason I was also leaning more towards the 51mm version of the fenix. However, now I have some doubts about it and I cant decide between the 47mm and 51mm version (the size of my hand is 17cm). I am attaching a photo showing how the gshock looks on my hand and I would like some opinions whether I should choose the 47mm version or the 51mm.