Like keys on the piano, if we only had black notes we would only have sad notes. And if we had only white notes to play we would only have happy notes. To play both sets of keys makes a perfect melody and balanced with both good and bad.
Short length is 22" is ment to be worn on the chest
Medium length is 32" is ment to be worn just long
Long Length is 42" and can be worn 3 diffrent ways