This is the best size for the corners. Of your hard to reach areas of your eyebrows especially for the unibrow area I would definitely recommend this

I find this an effective touch up tool for my brows between waxing appointments. It’s inexpensive and a sanitary way to provide grooming maintenance.

Before getting these, I was saying that I wanted to try and learn to do my own eyebrows. I need to learn how to use one's that are this small but I love the design of it.