On major bullion exchanges, kilo gold bars are traded every day between banks, financial institutions and governments. Containing exactly 32.15oz, or 1000 grams, these large gold bars are also a great way to own bullion at an extremely small premium over melt. Each bar has a purity of .9999 (i.e. 24-karat). Now, individual investors can hold the same bars major firms use for their reserves.