A gold bar also often referred to as gold ingot is the amount of refined metallic gold of any shape which is made by a bar producer meeting standard conditions of manufacture, record keeping and labeling. The ingots are bigger gold bars and they are produced by pouring the molten metal into molds.
The smaller gold bars usually come as a result of minting/stamping from appropriately rolled gold sheets. Normally, the standard gold bars kept as gold reserves by central banks and later traded among bullion dealers come in quantities of up to 400 troy ounce.