we have many different size challenge coin holders for any occasion,   Many of our coin holders are either 16" square or round or Maltese Cross themed.  These larger coin holders will accommodate  up to 30 coins.   Made from 3/4" thick pine and semi-gloss lacquered finished for long lasting life.  Our 11" and 12" holders will handle 18 to 20 coins.  We can custom make any holder you would like