Just try some on and see how they look on you. There's no rule. You'll be the one wearing it so if you feel comfortable, then it's fine.
It's not just the width though. The lug to lug size and how the lugs curve makes a difference, so you might think a 42mm in one watch looks great, but another 42mm will look and feel wrong because the lugs are longer and flatter, or whatever.
The only way to know is try them on.