These were labeled as kids, but it should have been TODDLERS. My 7-yr-old couldn't use any but the very biggest one because it pinched his feet so badly.  These are clearly a knock off, too, as the illustration for how to put them onto shoes is completely backward -- it has the smallest bands pictured as going at the TOP of the arch nearest the ankle.  One wouldn't even be able to get a foot into a shoe this way!  I ended up being able to use 2 of the biggest bands at the very bottom toward the toe, and then I supplemented with extras for a different brand.