I see, its what fits comfortably on the wrist, true. Not wearing the bracelet? There's some issue with the stock clasp?
I find the 053 interesting in that it is a 43mm diameter dial but sports a 20mm lug width. Rather atypical, one would expect at least 21mm and more likely 22mm. One nice thing is this would allow me to interchange straps between my other 20mm ones, the Sinn included.