If you were to ask a beauty blogger why they're late to something, I can guarantee that it will be one of two things; either struggling to perfect winged liner or making their eyebrows look somewhat reasonable. I've never truly bothered to fill in my eyebrows until I discovered that they were looking a little sparse so I've been trying out products to help make my eyebrows somewhat fuller. One product that I've recently repurchased is the MAC Eyebrow Pencil in Lingering which albeit is very expensive for how little product you get but it's one product that I seriously cannot live without.
The MAC Eyebrow Pencil in Lingering (£13.50) is essentially a self-propelling, selfsharpening, brow defining pencil that adds shape, colour and density all into one streamlined pencil shaped tool. The colour itself sits inbetween both a light and medium-ish brown which when used lightly, can define your brows completely but when used heavily, can fill in even the most sparse of gaps.
I purchased my first one of these back in June and didn't finish it completely until early October which for the amount you're getting and how often I used it, is money well spent in my eyes. I use this primarily to shape and define the very start of my eyebrows and to fill in the ends although when in rush, I will use this to completely fill in my eyebrows as the tip of this is so fine, it mimics hair perfectly. I'm pretty sure that there are better alternatives out there which last a lot longer but for the time being, I'm happy using MAC's Lingering.