Does the size of a magnet affect its magnetism?
A larger magnet CAN be more powerful, but it’s like asking, “Is a larger water hose able to deliver more water.” If the larger water hose has the same pressure as a smaller one it will deliver more water. Likewise, a magnetic field is affected by the way the magnet was manufactured and the strength of the field at that time. Some magnets are just more powerful than others, but generally, if two magnets are of the same strength, the larger magnet will be able to lift more.