The golden rule for the perfect beard shape is that your beard and jaw should work together to achieve a nicely graduated, oval shape. For example, if you have a square or rounded jaw, you will want to grow your beard fuller on the bottom to elongate or stretch your face. If you have an oblong or rectangular face, you will want to grow more hair on the sides while avoiding length beneath the chin. Remember this is only a guide and meant to aid your grooming journey. Embrace your individuality, play with different beard styles and break the rules - so long as you find the perfect beard style for your face!