STRAP SIZE (LUGS SIZE)
Measured in millimeters (mm) by the end of the strap where it attaches to the watch.
It's an inner width of the buckle where it attaches to the strap. Measured in millimeters (mm).
DETERMINE STRAP SIZE
Check Your old strap:
Check if Your old strap has size indication. If yes and it fit to your watch well you can order the same size.
Measure watch lugs:
To measure watch lugs use caliper or ruler as shown on pictures.
DETERMINE STRAP LENGHT
Strap lenght is as impotant as its other parameters. Well chosen strap provide good look and comfort. If you have typical wrist size the best for you is Regular. For small or big respectively Short and Long. If your old strap fits well order the same or similar.