Lululemon Star Runner Short Sleeve

Got this from my sister, it doesn't have tags or sizing insize but according to the measurements it's a size XS or a 4. 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 🚚 Spend $125 or more for FREE shipping. 🚫Smoke & Pet Free 🔝Rated Seller 🌟Poshmark Ambassador II Gold Star 🎉 New to Poshmark? Sign up with my code 🎉 MAGICMIRIAM 🎉 for $15 off your first order 🎉 * Posh Ambassador ll Gold Star * FAST SHIPPER * Top Seller