Based on my watches, 140mm is the perfect size for a 17 cm/6.75 in wrist, for watches with a lug-to-lug between 45-49 mm. 130mm is usable but can feel a little tight. For a lug-to-lug of 52mm, 140mm starts to feel a little too loose.
Light and fits perfectly. The only problem is that it's hard to take off from the wrist.
These straps allow you to switch up the look of your watches with ease. The straps are extremely comfortable. I have a 18cm this and a size 140mm fits well. For extra comfort I could wear a size 150mm. My watches have a lug width of 45-49.5mm.
Perfect fit, love it on my Hoffman