A:Answer According to the aftershokz website, the mini is 3cm smaller. I am a small adult female, and I have the mini trekz. (For reference, with hair accessories, several adult headbands are too big for me, but childrens headbands are way too small for me.) The regular trekz titanium headphones, seemed to hang too low on the back of my neck, and would get bumped around by my shirt/coat collar. But, the mini is a better fit, and just grazes the collar instead of being an obstruction. I don't work for aftershokz, but due to the fit of the mini trekz, I'd say that it was probably built for smaller adults, not necessarily for children. Hope that helped.
