I ordered a 9, as suggested. Because there is no light, is hard to tell if theyre on or off without them in to hear the "power off" or "power on". The day they arrived I put them on and it was like a slice of heaven for my feet. On to my next trial. Sehr gewichtig, was die Jungs aus Minnesota hier abliefern. Its on the larger side, I dont mind but I probably would have sized down if I knew beforehand (but Ive lost some weight so take that with a grain of salt). Also, micro-usb on a brand new product in 2020? Why?But now for the sound. Might last better/longer under a normal size human, Im pretty big. Como mencionan otros, el reposa cabezas se ve frágil, yo también instalé la lámpara trasera ahí, ya que la parrilla no ayuda mucho. Bought these for my 3 year old son because I wanted something for summer that he could easily get on and off by himself.