We see all styles of dress shirt cuffs, sometimes the French cuff, most usually the square or mitered barrel cuff. They both add a structured design, with straight, hard-line geometry. The rounded cuff, on the other hand, is soft on the eye, and doesn’t minimize the clean lines that your shirt may already have. It’s finished and deliberate, but doesn’t take your casual denim shirt or rumpled linen to a stuffy or unnatural place. You’re going to see rounded cuffs everywhere – not because they’re necessarily better, but because they walk the middle of the road in an entirely inoffensive way.
From:: Cuff notes.