You're looking at girls Zara Kids size 10/140cm black denim jeans.  There are 2 working pockets + coin pocket in front and 2 working pockets in back.  Elastic waistline. There is some stretch in the material, so even though the tag is gone and I can't confirm, I think there is some spandex.  There is some fading/piling/wrinkling from washes and wear, and the inside tag has been cut out.  I've taken pictures in flash and not to hopefully give you a better idea of what they actually look like.