What is a weight and what its size?

Weight: In physics, weight refers to the force exerted on an object due to gravity. It is the measure of the gravitational pull experienced by an object with mass in a gravitational field. Weight is denoted by the symbol 'W' and is measured in units of force, typically newtons (N) in the International System of Units (SI).

Size of Weight: The size of a weight refers to its physical dimensions or measurements. Since weight is a force, it does not have a physical size or dimensions in the traditional sense. However, when referring to physical objects used as weights, such as those found in weightlifting sets, the size typically pertains to their mass, shape, and dimensions. For example, a 5-pound weight plate might have a diameter of 9.5 inches (24.1 cm) and a thickness of 1 inch (2.54 cm). The size and shape of weights can vary depending on their intended use and purpose.