Also it costs quite abit. I cried as I threw these baby away. I think if you are an exact size I would get the correct measurement. As far as Alexa goes you need to go into the Alexa app first and add the Bose device before you can use the Alexa voice control. The audio person in me says HANDS OFF UE, but as a product designer – ugh, I get it. Update 2/19/2021 - "Finally received a snotty email reply to my replacement request only after writing directly to Amazon about the problem. I have a very wide foot and expected to have them stretched. It has a convenient on/off switch for the mic and volume control. Love these earrings, they are EXACTLY what I was looking for. Audio Technica ATH M-50xThese were the least comfortable.