One of the most common reasons people return a watch is that it wore bigger or smaller than they expected. The number on the spec sheet (38mm, 42mm, 44mm) only tells part of the story. Here's how to read watch sizes and pick one that fits.
Case diameter isn't the whole story
Case diameter is the width of the case, not counting the crown. It's the number everyone quotes, but two watches with the same diameter can wear very differently.
Lug-to-lug is the number that matters most
Lug-to-lug is the distance from the tip of the top lugs to the tip of the bottom lugs, where the strap attaches. If it's wider than the top of your wrist, the lugs overhang and the watch looks too big no matter what the diameter says. For most wrists, a lug-to-lug of about 44–48mm sits comfortably.
Thickness changes how it feels
A thick watch catches on shirt cuffs and sits high on the wrist. Under about 12mm is comfortable for daily wear; under 10mm feels dressy and slim.
A quick way to check at home
- Wrap a strip of paper around your wrist bone, mark it, and measure it with a ruler.
- Lay a ruler across the top of your wrist. The flat part, edge to edge, is roughly the most lug-to-lug you'll wear comfortably.
- Compare that to the watch's lug-to-lug.
Why so many collectors land on 39mm
A 39mm case is the middle ground. It has presence without overwhelming a smaller wrist, and it slides under a cuff. That's why both Season watches are 39mm:
- Season No. 2: 39mm diameter, 46mm lug-to-lug, 11.8mm thick including the crystal. A mecaquartz chronograph on a steel bracelet.
- Season No. 1: 39mm diameter, 45mm lug-to-lug, just 9.8mm thick. A slim fluted-bezel watch on leather.
Both are limited and numbered, and every order includes a free Autism Awareness watch.