How To Choose The Right Bracelet Size
Normal fit
For normal wear (It rests at the top of your hand)...
Measure your wrist around the boney part, then add half an inch (12mm).
i.e. if your wrist measures 7 inches, the right size for you is 7.5 inches.
If it measures 18cm, the right size for you is 19.2cm.
Snug fit
If you want a snug fit and the bracelet can be opened and closed, measure around your wrist where you want to wear it and go for that exact size or very slightly bigger.
i.e. if your wrist measures 7 inches, the right size for you is 7 inches.
If it measures 18cm, the right size for you is 18cm.
If the bracelet can't be opened and closed, you have to add half an inch (12mm) to your measurement to be able to slide it over your hand.
Tip. Since most guys don't have soft measuring tapes lying around, you can wrap a strip of paper around your wrist and mark it where it meets. Lay it against a ruler and you'll have your measurement.