LONDON LASH offers 0.20 thickness lashes that are used for creating beautiful one by one CLASSIC sets. 0.20 is the thickest lashes that LONDON LASH offers and that is to make sure that while lashes look dense and full, they don't overload or damage natural lashes. We strongly recommend not to use any heavier lashes than 0.20. J, B, C, CC, D and L Curls are available in Mixed and Single size trays. Choose yours!