Measures 5/8 inches. Great gift for Current or Returned Missionaries and even Ward Mission Leaders! Bar is 2 1/2 inches across and is an alligator clip. History: This symbol is used in many missions around the world. One might see this written on walls, blue planners, and many other things. The origin of this symbol is a mystery but it has spread all over the world. The emblem shows an arrow pointing under the water, meaning baptism by immersion.