Yes, wristbands are available on our website.
Note that Pulse HR wristbands fit wrists from 14 cm (5.5 in) to 20 cm (7.9 in).
https://support.withings.com/hc/en-us/sections/4411845170193-Pulse-HR
https://support.withings.com/hc/en-us/sections/360002170834-FAQ