This St. Christopher Air Force Pendant is made of sterling silver and is approximately the size of a quarter. Select above which chain style you want from the style options above:* 24 inch chain with clasp * a 24 inch endless chain * no chain at all, so just the pendant only (so you can pair with the chain of your own choice) . The medal is gift boxed in a sturdy velvet jewelry box ready for gift giving.This medal comes backed by a LIFETIME Manufacturer's warranty against wear and damage.