These two sizes of strainers allow for all types of possibilities. The 3" is great for straining tea and teaspoons of things for baking, while the 4" is good for straining things such as quinoa. These strainers are easy to clean, simply add to the dishwasher after use. The loop allows the strainers to easily rest on top of cups and bowls. The stainless steel mesh wont rush even after multiple uses!