Lululemon Swiftly Tech LS Crew Size 4

We designed this anti-stink long-sleeve layer with running (and sweating) in mind. Silverescent® technology, powered by X-STATIC®, inhibits the growth of odour-causing bacteria on the garment. Designed for Run **The size tag has been removed - I think this is either a size 2 or 4 I cannot for the life of me remember. I checked for a hidden size tag and can't find one anywhere. It fits me like a 4 based on my other Lulu items? Features Product features SILVERESCENT® TECHNOLOGYPowered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the garment No chafeSeamless construction in the body minimizes chafing thumbholesHelp keep your sleeves in place and hands warm fitBody Skimming, hip length VENTILATIONEngineered Mesh is placed in high-sweat areas