10 oz silver bars from €595.50

The troy ounce

The wholesale silver market counts in troy ounces, one troy ounce of metal at least 999 parts per thousand pure. A troy ounce is 31.1034768 grams; both the LBMA and the US measurement institute NIST use that figure, and a kilo is 32.1507465 troy ounces. The ordinary ounce, the avoirdupois ounce, is 28.34952 grams, so the troy ounce is heavier.

Good Delivery

A bar for the London wholesale market is on a different scale: the Good Delivery bar weighs 1,000 troy ounces, about 32 kilos, with a 10% tolerance either way, and has a fineness of at least 999.0 parts per thousand. Kilobars, 100-ounce bars and smaller ones are not accepted there, though they may be in other markets or on exchanges.

What makers offer

Valcambi makes a cast 10 oz silver bar in 999.0, measuring 33 by 57 mm. The Perth Mint's cast 10 oz bar contains 10.00 troy ounces of 99.99% silver, weighs at least 311.035 grams and measures at most 63 by 36 by 16 mm.

The Royal Canadian Mint launched a 10 troy ounce bar for buyers who wanted smaller bars. The Royal Mint's Britannia bars come in 999 silver in 10 oz and 100 oz.

In the United States

In the United States, the standard minted silver bars were 1, 5, 10 and 100 oz and, on occasion, kilobars, according to Metals Focus. Cast bars there are mostly 10 or 100 oz; kilobars and 1,000 oz Good Delivery bars are also bought.

In Australia

In Australia, cast 1 kg bars are by far the most popular, according to Metals Focus, but 10 oz bars also sell in sizable volumes and have gained in popularity in recent years. With the rising silver price, interest in the 10 oz bar has grown, albeit from a low base.