Service Stars show how many years of tenure the particpant has in a program.
|| Service stars may be worn by all youth and adult members who have at least one year of tenure with the Boy Scouts of America. The stars are worn with the appropriate color background for the phase of Scouting in which the service was rendered. If an individual's primary registration is in one phase of Scouting and later in another, separate stars with the appropriate background and numerals may be worn simultaneously. Or, leaders may combine youth and adult tenure into one or two stars with blue background.
If a medal or embroidered knot is worn, service stars are worn 3/8 inch above the medal or knot.
|— Insignia Guide
If no medals or embroidered knots are worn, service stars are worn 3/8 inch above the left pocket. Refer to the uniform inspection sheet. A Service Card is often presented along with the service star.