Gold ingots are basically gold bars that are cast from a mould rather than stamped like a gold coin. They tend to be rougher and thicker than stamped bars, often called biscuits, but still come in all weights from one gram up to a "London Good Delivery Bar" which is 12.5 kilograms or 400 ounces troy weight.

 There is no difference between types or shapes of bars, so whether it looks like a wafer, ingot or biscuit, we call them all bars.