I have not bought this yet. But from just looking at the pictures on the website especially the one picture that shows the instructions of how to use the 'Lash Ruler'. The 2nd step should be more specific on the fact that you should ONLY cut each lash from the outside of the lash band. NEVER CUT the lash that is going to be on the inner corner of your eye. The instructions make it sound like you're supposed to cut on both sides of the lash band were you made the marks on the ruler which is not how you're supposed to cut a lash and a lot of people that have not worn lashes or don't know will do that and ruin their lash.