Astrologers suggest to wear Rudraksha according to the ruling planet as under:-
Sun – One Mukhi or Twelve Mukhi
Moon – Two Mukhi
Mars – Three Mukhi
Mercury – Four Mukhi
Jupiter – Five Mukhi
Venus – Six Mukhi or Thirteen mukhi
Saturn – Seven Mukhi or Fourteen Mukhi
Rahu – Eight Mukhi
Ketu – Nine Mukhi