no teeth [SEP] if you have hair that does not hold barrettes well then these are not for you there are no teeth on their underside to keep them from sliding i tried a few times to wear these and they ended up sliding down my hair through out the day i do not have time to keep adjusting my hair it was so annoying i am past he time for a refund all the shapes are fun you could wear more than one but that is just more that end up falling i do not recommend this item not worth the money