Key Watch Measurements to Know
Case Diameter
Case Diameter ("Case Size" or "Watch Size") refers to the measurement of the watch's widest point (generally the 3 o'clock position to the 9 o'clock position).
This measurement is most important when viewed relative to the wearer's wrist. Typically, those with larger wrists prefer a larger case size, and vice versa.
A typical gentlemen's watch is approximately 40mm, while a standard ladies' watch is around 28mm. However, usage and trends can affect these measurements and are essential to consider before purchasing. Watches made for plots, including many Chronograph and GMT styles and Dive watches, typically feature larger case sizes to make them easily read in austere conditions.
Similarly, style preferences can shorten case sizes for relatively short periods. In the 1970s, case sizes shrank, so the average gentleman's watch was 30 - 35mm, and the ladies' watch was 23 - 25mm. Conversely, in the early 2000s, more prominent faces came into vogue, with men sporting 42 - 45mm and ladies 34 - 36mm.
As watches are intrinsically linked with fashion, there is value in having a few pieces in your collection that are oversized or undersized to match a specific outfit or fashion trend. However, it is always important to know a standard size that works well with your wrist and keep most of your pieces within 2mm of that goal. Below is a quick reference on standard watch sizes for your wrist.
How to Measure Your Wrist: Use a tape measure to measure the circumference of your wrist where your watch will rest.
- 6" Wrist or Smaller: 23 - 36mm
- 6" to 7" Wrist: 39 - 42mm
- 7" Wrist or Larger: 44 - 46mm
Image Credit:Lug to Lug
Lug to lug refers to the width between the extended lugs and determines the bracelet or strap diameter.Lugs also increase the total length of the watch when measured against the wrist. A widely held rule is that the lugs should never "spill over" the wrist of a watch's wearer.
Image Credit: TrueFacet.com
Lugs, therefore, are a critical factor in determining both face-up appearance and the width of your bracelet or strap.
Case Thickness
Case thickness refers to the measurement of the case from the top of the crystal to the bottom back of the case. Before Quartz watches came on the scene, it was generally considered that a thinner watch was superior as the watchmaker was performing their art in a more limited space. There is more variability, and thickness has become more aligned with style and taste than engineering mastery.
A typical watch ranges from 6mm to 10mm thick. The general rule is that the wider the case diameter, the denser the watch. Before buying, you must try on a new piece and judge the thickness, weight, and position it holds on your wrist. 2mm may sound like a slight difference, but it can mean the world regarding your watch!
Image Credit: SuitsExpert.com
