Leviticus 8:22-24
"And he brought the other ram, the ram of consecration: and Aaron and his sons laid their hands upon the head of the ram. And he slew it; and Moses took of the blood of it, and put it upon the tip of Aaron's right ear, and upon the thumb of his right hand, and upon the great toe of his right foot. And he brought Aaron's sons, and Moses put of the blood upon the tip of their right ear, and upon the thumbs of their right hands, and upon the great toes of their right feet: and Moses sprinkled the blood upon the altar round about."
When the high priests were being consecrated or set apart unto the Lord, they had blood applied to their ears (what they would hear), their thumbs (what they would put their hands to), and their big toes (where their feet would take them or their walk before the Lord).
This is why I suggested, and it is only a suggestion, that a ring on your toe might symbolize that the covenant which God is most interested in for you right now is your walk with him.