London Brows new Cocktail Lashes. What does this mean? Cocktail lashes are offered in 3 tray options. In each of these trays, you will have 3 different lengths of lashes mixed in together on one strip. For example in a tray marked 7-9-11, there are lashes 7,9,11mm in length mixed in together on the same strip. Why did we do this? Our natural lashes are all different lengths, and we wanted to mimic this natural look. Our clients are loving this natural look. These trays come in two different weights and five different length options. Please check our blog page for ideas on how to work with the inner corners.