Silk x Fernando Crease Define Me BrushThe Crease define me brush is great for a more controlled and direct eyeshadow placement and blend. Its tapered to be used in your eye crease, lash line and bottom lash line, and great for a Smokey eye look. Hair Length: 16mm Ferrule Length: 40mm Handle Length: 120mm Handle Diameter: 7mm 5 REASONS TO USE VEGAN SYNTHETIC MAKE UP BRUSHES1. Synthetic brushes are better suited for people with sensitive skin as some people are allergic to animal hair2.