Find Your Strap Size in 3 Simple Steps!
#1 - Use the Centimeter side of a standard ruler. *Always measure in Centimeters as Inches are too large for an accurate conversion to Millimeters.
#2 - Measure the space between your watches lugs in Centimeters. (see red line labeled "Inner Space" on image)
#3 - Once you have the measurement in Centimeters, move the decimal one place to the right to convert your measurement into Millimeters. In the image, you can see that the lug measures 2 Centimeters, which converts to 20 Millimeters.