How to distinguish nine-point sleeves from seven-point sleeves

When standing naturally with hands drooping:

Long sleeve: it can cover the wrist, generally it can cover watches, bracelets, etc. ;

Nine-point sleeves: can cover most of the forearm and expose the wrist, but can't cover watches, bracelets, etc.

Three-quarter sleeve: it can cover the elbow and expose most of the forearm.