there are no tags but assuming it is a size 4 based on fitting. It is a faded black not dark or rich. Fun features with the zipper on the sleeves, and deep pockets in the front. It is form fitting and has long arms as Lululemons typically designs that way. The fabric is a cotton, spandex blend, with a good stretch. And because the color black has faded it is mostly cotton vs synthetic fibers.