Most shapes of makeup brushes are either rounded, domed, slanted or flat.
Rounded brushes give really soft edges, are great for applying product in sweeping motions. They allow you to apply any sort of powders or anything you want to apply in a soft, subtle way.
Domed brushes provide precise placement. These brushes are great to use in a pat-and-roll motion.
Slanted brushes give you the control you want for precise placement.
Flat brushes allow you to lay down a dense amount of color.
Here below are some popular brush shapes for your reference when you are planning to customize brushes with your own brand.