It all depends on what your lashes are like now. I have the small Asian eyes with very short lashes, so I wend for a sparser, lighter set. They still looked a little bit fake especially if I didn't touch up the rest of my eye area with some makeup. I trimmed the lashes down and they looked better. I'm sure if your lashes are naturally long, you could get away with a more daring length and still have it look natural.