Lululemon Star Runner Short Sleeve

Got this from my sister, it doesn't have tags or sizing insize but it feels like a size 6. Key features reflective detailing helps in low-light visibility body-mapped for airflow with moisture wicking, quick-drying Diamond Mesh to help keep you dry dropped hem in the back for bum coverage chafe-resistant flat seams - aggravated underarms are so passé Tech specs designed for: run fabric(s): Rulu™, Micro Diamond Mesh properties: wicking, body-mapped, flat seams, reflective fit: body-skimming length: low hip