GoPro Fetch dog harness
Universal, Hero 7, Osmo Action
GoPro Fetch dog harness
Universal, Hero 7, Osmo Action
Unfortunately, there is no more precise information on this from the manufacturer itself.
However, it does say: Universally adjustable for small, medium and large dogs from 7 to 54 kg. The chest strap is removable for smaller dogs.
So you can assume that it works for practically every kind of "normal" dog.
My dog is a Cocker Spaniel, about 17kg and the harness is almost too big.