Having no sideburns looks funny as the hair style has no defining line where it stops. A little sideburn is required. The lenght and fullnes of the sideburn is considered based on your hairstyle. The sideburn should balance and compliment your hairstyle. If you have a short hairstyle, a long busy sideburn doesn't make sense - what makes sense is a longer hairstyle with those fuller and longer sideburns.
Another key aspect when determining the sideburns is genetics.
The two aspects of sideburns that you should be most concerned about are length and width. The length categories: short, medium, long, and extra long.
You can play with and experiment with sideburns to find something that you totally love. But when experimenting, consider your face shape. The four basic face shapes: round, square, oval, and triangular. See more here for how to determine your face shape.
The idea is that you want to contrast and balance your face shape:
Round: slim with longer sideburns to elongate your face. Keep tight to face.
Oval: medium length and medium width. Avoid super long and super thin because they will make your face look longer.
Square: medium-to-long sideburn that is thinner. The visual illusion is a narrow jaw.
Triangular: wider (standard) and longer sideburn which will strengthen your jaw.
I have one more tip: instead of cutting your sideburns straight across and blunt, give them a slight angle that follows your jawline.
Another key aspect when determining the sideburns is genetics.
The two aspects of sideburns that you should be most concerned about are length and width. The length categories: short, medium, long, and extra long.
You can play with and experiment with sideburns to find something that you totally love. But when experimenting, consider your face shape. The four basic face shapes: round, square, oval, and triangular. See more here for how to determine your face shape.
The idea is that you want to contrast and balance your face shape:
Round: slim with longer sideburns to elongate your face. Keep tight to face.
Oval: medium length and medium width. Avoid super long and super thin because they will make your face look longer.
Square: medium-to-long sideburn that is thinner. The visual illusion is a narrow jaw.
Triangular: wider (standard) and longer sideburn which will strengthen your jaw.
I have one more tip: instead of cutting your sideburns straight across and blunt, give them a slight angle that follows your jawline.