An ounce of gold, specifically a troy ounce used for precious metals, is equivalent to approximately 31.1035 grams. In terms of physical size, a 1 troy ounce gold bar typically measures about 24mm wide, 42mm long, and 2mm thick (0.95 inches × 1.65 inches × 0.08 inches). A 1 ounce gold coin can be roughly compared to the size of two dimes stacked, about 30-37mm in diameter depending on the coin, and weighs the same as six quarters stacked. This measurement differs from the standard avoirdupois ounce (about 28.35 grams) used for everyday items, as the troy ounce is specifically heavier and standardized for precious metals like gold.
