Generally speaking there are three key brow shapes: low arch, subtle angular, and high arch. As a broad rule of thumb, read below for what type of brow meshes the best with common face shapes:
Long or heart-shaped face: Offset your lengthy face structure with a bolder, bushier, straighter brow.
Round face: The key with this face structure is to not over-arch the brow or you can make the face look more circular. Instead, create a more angular appearance by adding a soft point in the middle, not a sharp arch.