 The star , which is worn pinned to the left breast , was introduced in the 17th century by King Charles I and is a colourfully enamelled depiction of the heraldic shield of St. George 's Cross , encircled by the Garter , which is itself encircled by an eight @-@ point silver badge . Each point is depicted as a cluster of rays , with the four points of the cardinal directions longer than the intermediate ones . The stars of Stranger Knights and Ladies were once set with several jewels . Since the Order of the Garter is the senior order of the United Kingdom , a member will wear its star above the others ( up to three ) that he or she holds . 
