sideburns

“Shoulder length hair is acceptable for a female, but not a male.

It must be off the collar when standing straight, off the top of the ears, and above the eyes.

Sideburns may not extend below the bottom of the earlobe, mustaches may not extend below the lip, or the corners of the mouth. Beards, goatees, or any hair below the mouth is not allowed.”

 - FBI hair regulation