All lengths and widths for straps are measured in millimeters. Length is expressed like this: 125/75. The first number (125) is the length in millimeters of the tongue side of the strap. The second number (75) is the length in millimeters of the buckle side.
-----> What length should I get?
First you need to know your wrist size. To figure it out, wrap a piece of string around your wrist, mark the string where it crosses itself, lay it flat on a table and measure the distance between the marks.
The table below gives general guidelines for length.
For smaller watches (non-Panerai sized watches) I suggest adding at least 5mm to both measurements.
6.0" - 6.40" (15cm - 15.9cm)....= 125/75
6.50" - 6.9" (16.0cm - 17.5cm) = 130/80
7.0" - 7.4" (17.8cm - 18.8cm)...= 135/85
7.5" - 7.9" (19.0cm - 20cm).....= 140/90
8.0" - 8.4" (20.1cm - 21.3cm) .= 145/95
8.5" - 9.0" (21.6cm - 23cm).... = 150/100
The preceding suggestions are just that: Suggestions. My straps are generally thicker than factory straps so they wear a bit shorter. If your factory 115/75 strap is "just right" one of my straps in that same size will be a little too short.
If you have any doubt about which length to get, always choose longer!
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