How to Full On. Your brows are hair (like duh) so shouldn’t your brow makeup look like hair as well? We thought so, which is why we created our Full On Brow Pencil. This 1.4mm oval shape pencil allows you to EASILY recreate brow hairs where you need. Another take away on this video is..Apply hair like strokes where you are lacking, not where you have the hair💡 This is how you achieve a fuller more balanced brow.