When buying a refrigerator, consider capacity, energy efficiency, and design. For families, larger capacities (18–26 cu. ft.) are ideal, while singles or couples might need less. Check for an Energy Star rating to save on electricity bills. Decide between styles like top freezer, bottom freezer, side-by-side, or French door, depending on your kitchen layout. Look for adjustable shelves, a built-in water dispenser, or smart features if desired. Measure your space to ensure the fridge fits. Noise level and warranty are also crucial factors for long-term satisfaction.