Compatibility: Fitbit Inspire, Inspire 2, Inspire HR, Ace 2
Material: stainless steel metal Fitbit band.
Band Length: Fully adjustable to fit almost any wrist. Sizes: S size 135mm-170mm / L size 160mm-220mm
Happy with my purchase. The bands fit well on the Fitbit and there is a nice selection of colors. Customer service is excellent.