this is good to know, even despite the fact that it took some time.
I asked the question in the first place, because the measurement guide shows me a Size 6, but if I will tighten it up a bit, its on a verge of 5. Same goes with measuring tape. with a loose wrap, Im 15.8mm, but with just a slight tightening its 15.6 - where 15.8 is the min for Size 6, but 15.7 is already recommending the Size 5 (out of two) and 15.6 is "solid 5" on their site.
I am a bit worried that the size 5 may be too tight and uncomfortable, but on the other hand Size 6 may be too loose and I hate when the watch is floating (owning sport loop with SE atm, but I really would love to try the Solo loops as they looks great).
I watched few videos on youtube suggesting to take one size down, but that was on AW6 launch. maybe the improved something over the years, but couldn't find anything on that.
Im more towards picking the Size 5, considering that AW8 is 1mm longer and that the loop may become slightly loose over time.