A good email list size depends on your goals. You should focus on quality over quantity. A small list with active subscribers can perform better than a large inactive one. You should aim for at least 1,000 engaged subscribers for strong results. Businesses with broader reach may need larger lists. You should track engagement rates like open and click rates. These metrics matter more than just the number of subscribers. You should also segment your list for targeted campaigns. This improves results even with a smaller audience. Building an active and responsive list should always be your main priority.