Gold 
1000 oz Silver Bars: Impact of 5 Industrial Revolutions on Silver Bullion
Getting the cheapest pure silver bullion requires economies of scale. Therefore, larger is better up to the size that a person can handle. The largest silver bullion bar available is the industry standard 1000 ounce silver bar. Since the Industrial Revolution, these large-format bars have been globally accepted as the standard industrial size and the cheapest, most efficient form of pure silver bullion. The evolution of this inexpensive bullion bar’s refining, fabrication and distribution can be seen through six stages of technological advances.
