Have you looked into withings? They’re analog watches with a small lcd for notifications, fitness tracking, etc. They last a month between charges and are not too big.

Thank you for pointing those out, I had no idea fairphone had expanded into headphones!

They’re now on my radar for my next pair, but I’m going to run my current headphones for as long as possible before making a new purchase (5 years with my wireless in-ear buds and still going strong!)