They are hard to find, @deamo5333 - it takes a lot of careful searching. (I say careful because Amazon’s search feature keeps taking me to bands and extenders that will only fit older Fitbit models.) But here is a band that may work for you: Elastic band for the Sense that comes in size XL and will fit up to an 8” wrist. And this one says it will fit up to an 8.25 wrist.
Personally, I like a larger band so I can wear it around my ankle when using my recumbent exercise machines. Extenders for past Fitbit devices were not available on Amazon until the devices had been out for a while. So keep an eye out for that.
