"Skinny, barely-there brows can look harsh and actually add years to your look! Our brows ‘thin out’ as time passes, so a full, lush brow looks more youthful. Look at the fullest section of your brows, use that as your guide, and use natural-looking brow makeup to add volume where needed. Work with your natural fullness...you can’t fight nature too hard! And as always, go with what looks good on you, not what the trends are.
For a quick fix, try using a brow volumizing product like Benefit's Gimme Brow—it's the fastest way to fake a more full and voluminous arch. It's a brow fiber gel that will actually mimic the look of real hair. It’s micro-wand applicator makes it super-easy to apply so you can get instant arches each and every time."