How To Measure Watch Band Lug Width. To measure the lug width, simply measure the gaps between the two lugs. Align the inside of one watch lug at “0” and make note of the widest full millimeter at the inside edge of the other watch lug.
Helpful instructions on how to find the lug width of your watch, take a look. However, if you don’t have calipers, a metal rule and a steady hand will do just fine. Using the ruler, take your watch case and line the inside of the watch lug up with the zero marker on the metric side of the ruler as most watch band widths are given in millimeters.
Watch bands are ordered by the width of the band (in millimeters) where it attaches to the watch.
The size of the largest section of the old band, gives you the watch lug width. Make sure you measure from the inside of the lugs as shown in the example. Measure the distance between the watch lugs in millimeters (mm). Using the ruler, take your watch case and line the inside of the watch lug up with the zero marker on the metric side of the ruler as most watch band widths are given in millimeters.