This is personal – but enough so you can smell it, and not too much that it overpowers the surrounding area. Your ‘scent circle’ should be your arms’ length and only when people come into your circle should they smell your perfume. If you’re unsure about whether you tend to ‘overdo’ your fragrance, ask a (good) friend. And take into account the occasion, too: you would certainly want to wear more for a romantic night out than to the office, or lunch with a future mother-in-law.