This is my understanding of it. “Over yander” = still within eyesight. Example: See my hat right "over yander". 5 “over yanders” = a stones throw. Example: It's only "a stones throw away". 3 “stones throws” = a piece. Example: “He lives just up the road “a piece”. 4 “a piece’s” = “A country mile”.
Don’t expect me to explain how far a hop, skip and a jump are.
While on the discussion of distance. After moving to the middle of nowhere several years ago. I was going to help a guy I had met with some equipment he needed repaired. When I asked for directions he told me to stop at the gas station on the edge of town and get a six pack. Then head south out of town, right after you toss the third beer can out the window turn left. You'll know it when you see the pile of cans on the corner, he said.