Expanding the size of something is the perfect antonym for cutting down size. When businesses expand their operations, they may hire additional employees or open new locations, which can lead to an increase in size. Alternatively, if someone were to expand their home, they might add new rooms or expand existing ones. By expanding the size of something, one can increase capacity, improve productivity, and accommodate more people. Expanding the size can also be beneficial for individuals, such as when they buy a new car with more room, or when they move to a bigger house to raise their family. Opposed to cutting down size, expansion can bring various benefits and opportunities.