IWC Portofino Midsize Automatic 37mm, reference IW458103

IWC Portofino Midsize Automatic 37mm Compatible Leather Straps

Reference: IW458103

Explore IWC Portofino Midsize Automatic 37 mm, reference IW458103, and its strap measurements.

Case diameter
37 mm
Lug width
18 mm
Suggested buckle width
16 mm
Connection type
Check the watch attachment before ordering
Explore straps for 18 mm lugs

Strap compatibility

The right strap for IWC Portofino Midsize Automatic 37mm

Choose a strap measuring 18 mm at the watch lugs. Check the attachment and your existing strap before ordering.

Our recommended combinations

Choose your leather color, stitching and length after confirming the watch lug width. Buckle sizes are suggestions.

The right length

How do you measure your wrist?

To choose the right strap length, measure your wrist where you normally wear your watch.

  1. Wrap a flexible measuring tape around your wrist without leaving a gap.
  2. Record the point where the tape meets in centimetres.
  3. If you are between sizes, ask for guidance based on your preferred fit.