Both 1-gram and 1-ounce gold bars can be a smart investment, but one may be the better option in today's market.

But one of the more popular options is gold bars, which are available in different sizes, including 1-gram and 1-ounce gold bars.

There are many sizes of gold bars to choose from. Here's how to decide if 1-gram bars are a good fit for you.

Costco's largest gold product is a 100-gram bar from PAMP Suisse that last sold for $7,599.99. The jumbo-sized bar was briefly available this week, but sold out in less than a day.

The vending machine offers both gold and silver items including coins and mini-bars that weigh upwards of 1 gram.

Costco has been selling out of its one-ounce gold bars — priced at $1,949.99 and $1,979.99 — and are eligible for the 2% cash back that comes with an Executive Member card.

If you've been itching to get into the gold market at Costco, the retailer has put a limit on how many of its gold bars you can buy.

Korea's convenience stores and vending machines are selling gold, with younger people flocking to buy. Bite-sized gold bars have been selling since April, weighing in between 0.1 and 1.87 grams.

Many buy gold as a hedge against inflation and Costco sold around US$100 million in gold bars during its most recent quarter You can save this article by registering for free here. Or sign-in if ...