I'm so glad I ordered 2 of these. Completely silent on low speed, I can barely hear it on high. It is the blades that measure 6", the housing takes it to 9" Very substantial and well made, good color (bone). I bought one of them to keep the air moving in my plant room and it is doing a very good job of it even on low speed, the other for a spare. Thanks for this terrific value! They were on my doorstep in 36 hours!!