Just Stop Oil activist, 77, faces jail recall as wrists too small for electronic tag
(www.theguardian.com)
Depends. My feet are too small to keep me secure in my partner's inversion table, which tightens around the ankles. So, if the ankle monitor is similarly unable to go small enough, I'd expect a similar problem.
On the other hand, I've worn ankle bracelets just fine. But an ankle monitor might be less flexible/able to tighten into the curves of the ankle.