Lululemon Women’s Wunder Under Low Rise Black Leggings

There is some piling, as shown in the photos, otherwise in perfect condition. I believe it’s a size 4 or 6, but please see measurements. Had these for a while and don’t remember. There is no material or size tag. Length- 37” Waist- 13” Waist to crotch- 7” Smoke-free home.