I dont know why when I measured my space 18"  didnt seem that big but when the light showed up it seemed much larger than I had envisioned. Regardless, they are exactly what I wanted and exactly as stated in the description. They are beautiful, I can see why people didnt care for the flush mount because it is tight to the ceiling however that is what I wanted so in our closet they are perfect! Very nice light for such a reasonable price!!!