Stone (US): While the stone is not commonly used in the United States, it is equivalent to 14 pounds (approximately 6.35 kilograms). In some contexts, people may refer to their weight in stones.
Grain: The grain is a unit of mass primarily used for measuring the weight of small objects or quantities, especially in the context of bullets, ammunition, and some food products. One grain is approximately equal to 0.0648 grams.