Navy Male’s Hair Standards


    Keep hair neat, clean and well groomed. Hair above the ears and
    around the neck shall be tapered from the lower natural hairline
    upwards at least ¾ inch and outward not greater than ¾ inch to blend
    with the hair style.  Hair on the back of the neck must not touch the
    collar. Hair shall be no longer than four inches and may not touch the
    ears, collar, extend below eyebrows when headgear is removed,
    show under front edge of headgear, or interfere with properly wearing
    military headgear. The bulk of the hair shall not exceed approximately
    two inches. Bulk is defined as the distance that the mass of hair
    protrude from the scalp.  

    Hair coloring must look natural and complement the individual.
    Faddish styles and outrageous multicolored hair are not authorizes.
    The unique quality and textures of curled, kinked, waved and straight
    hair are recognized and in some cased the ¾ inch taper at the back of
    the neck may be difficult to attain. In those cases hair must present a
    graduated appearance and may combine the taper with a line at the
    back of the neck. ONE (cut, clipped or shaved) natural, narrow, fore
    and aft part is authorized.

    Varying hairstyles, including afro are permitted if these styles meet the
    criteria of maximum length and bulk, tapered neck and sides, and do
    not interfere with properly wearing military headgear. Plaited or
    braided hair shall not be worn while in uniform or in a duty status.

     Keep sideburns neatly trimmed and tailored in the same manner as
    the haircut. Sideburns shall not extend below a point level with the
    middle of the ear, shall be of even width (not flared) and shall end with
    a clean shaven horizontal line.  Muttonchops, “ship’s captain,” or
    similar grooming modes are not authorized.
Military-Haircut.com
Navy Hair Cut Standards, Styles, and requirements