you will need 12 big beeds (one of themhas to be special shaped)and 9 smaller onesconnect each set of 9 with 1 big beed using a stringany beeds any string it doesnt have to be anything fancy its just a tool so you dont lose count while vibrating very high numbers (108 for ex) although the rosary does catch energy and become stronger the more you use it but i think you need to preserve it in silk to keep the energies for me honestly i dont do that andi just use it as a tool so i dont lose count HAIL SATAN