Madewell Floral Tank Blouse

Slightly cropped loose blouse from Madewell. I’m not sure what size this is. It was given to me by my mom without tags. But I’m guessing it is a small or medium. I am a typical small and this fits me like the model (see pics). Floral design with button front. Adjustable straps. About 18in from underarm to underarm laid flat. Worn once.