To maximize the effectiveness of a ceiling fan, it's important that the length of the blades be proportional to the size of the room. Small blades in a large room don't create the necessary air movement, while large blades in a small room distribute air excessively. Additionally, proportionality is important from a design standpoint as well. At SWING, we put a lot of thought into designing the ratio between the size of the room and the diameter of the blades, and these are our recommendations: 7-10m - 42" 10-13m - 48" 13+m - 54"- 60"