Lululemon swiftly tech racerback tank top size 10, 12 or 14

Great condition, used only a handful of times. Not sure of the size but unstretched armpit to armpit is 18” and waist is also 18”. It is 25.5” long and a sky blue color. I removed the tags but the silver logo is on the back as well as knit through the front. Very stretchy! Only flaw I could find was a slight pull on the inside of the top, so not visible from outside - see last picture.