Lululemon Swiftly Tech Long Sleeve 2.0 Sz 4/6?

Sleeve Length 21.5” Inseam 14.5” Underarm to Underarm 15.5” Retail $78. So soft, and in great condition, other than missing the size tag. Guessing it to be a Size 4/6, with the above approximate measurements. Please message with any questions. Designed for: Run Lycra®: Added Lycra® fibre for shape retention Ventilation: Mesh construction for breathability Fit : Body Skimming, hip length Recycled polyester: 100% of the polyester in this product is recycled