When choosing the length of premade fans, consider the client's natural lash length, eye shape, and desired look. It's important to select a length that enhances the client's features without overburdening their natural lashes. Usually, 8mm and 9mm are considered ‘short lashes,’ great for the inner or outer corners of the lashes, as the natural lashes there tend to be quite short and weak. 10mm and 11mm are used for transition or the longest length for those who prefer a natural result. 12mm and 13mm are usually the longest lengths you will use to create most sets. 14mm, 15mm, and 16mm are for those who want a really long and dramatic effect. We recommend using them carefully as they can be quite heavy for most natural eyelashes.