“6 cubits and a span which is over 9 feet tall.” David had to overcome a tall task. The weight of Goliath’s armor is an indication of how strong he was. Verse 5 tells us that Goliath, “…wore a coat of scale armor of bronze weighing five thousand shekels…” Bible scholars tell us that Goliath’s armor weighed as much as 220 pounds. Verse 7 tells us that Goliath’s spear had an, “…iron point (that) weighed six hundred shekels...” which could have weighed as much as 25 pounds. David faced a strong situation. Goliath was a walking arsenal. He was the best-equipped warrior that money could buy! Goliath appeared to be invincible.
David, on the other hand, had only a shepherd’s staff, a sling and a few stones.
By all human standards, Goliath was the odds-makers choice. In the eyes of any human spectator, David’s problem was too gigantic for him to overcome. However, God stepped in and helped David successfully deal with his over grown challenge.