Adult silver medallion St. George the Great Martyr komboskini, red. Front side St. George, back side Chi Rho (The Chi Rho is a Christian symbol for “Christ” written by superimposing the two Greek letters “Chi (X)” and “Rho (P)” which are the first two letters in Greek of the name of “CHRist.”).
 
This komboskini stretches. A video is available on how to do this.