Lululemon 105F Singlet Plum M/L (8? 10?)

Beat the heat in this lululemon tank built for high heat. The color is a nice purple (closer to my photos but a little brighter). It’s Luon and sweat wicking. Lots of wash and wear (eg pilling) hence the low price. No size tag—I’m listing as medium. My best guess is that it’s size 8 or 10