I'm in the process of shaping my eyebrows, One is a little fuller than the other and bye the time I get them in the same shape it will look a little sparse. There's no avoiding it. What do I use to pencil that eyebrow in?
Well there are eyebrow pencils, there are powders, even tinted gels... Since you don't wear makeup the best thing for you to do would be to head on over to Sephora, MAC or even makeup counters in department stores. That way you will be recommend the best product for you and you will also learn how to use it correctly so the end result is natural.
Yes their are pencils that are specifically made for filling in eyebrows their fairly easy to find if you don't want to spend a lot of money you can try a drug store like cvs or Walgreens in the make up isle if not you can check out sephora make sure to keep you brow color in mind . Besides pencil you can use eyeshadow close to your brow color and apply it with an angled brush
There are specific eyebrow pencils and kits and such you can use. I get the cheapo ones made my Rimmel or covergirl(you can buy them at walmart or any drugstore). You will have to pencil BOTH eyebrows to make them match though. Good luck!