I use a Melitta size 2. I've bought filters from different brands, I didn't notice the difference. They match the overall dimensions of a size 2, but have a sharper point at the end, preventing the sides of the filter from lying flat against the coffee maker. This problem is easily solved by flipping the filter up a short distance and I like that these filters are a bit taller overall so I'm less concerned about soil running over the filter rim when it's very full. These are good filters, but they are not made specifically for Melitta.
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