Skinny Ankle Jeans
Slim-fit pants or skinny jeans (when made of denim) have a snug fit through the legs and end in a small leg opening that can be anywhere from 9" to 20" depending on size. - SOURCE Wikipedia
I got a pair of pink skinny ankle jeans last year for my birthday, I remember the first time I wore them reading the tag before taking it off. The translation to Spanish made me laugh, so I snapped a picture.
Skinny Ankle should literally translate to Flaco Tobillo in this case they wrote Pitillo Tobillero which translates to Small Penis Ankle lol