The one-ounce gold coin is usually the most efficient and liquid standard size. It is widely recognized, easy to price, and typically carries a lower percentage premium than fractional gold coins.

Fractional gold coins, such as half-ounce, quarter-ounce, tenth-ounce, and gram-denominated pieces, are more divisible and easier to sell in small amounts. The drawback is that fractional gold usually carries much higher premiums per ounce.

For stackers with enough capital, one-ounce coins are often the best core holding. Fractional gold can still be useful for flexibility, but buyers should compare premiums carefully before accumulating too much small gold.