The size is M/L but it runs small. I have a bigger chest (34D) and this barely fit me but if I moved at all it would shift and my boobs would come out of it. (OTHER COLOR INCLUDED SO YOU CAN SEE THE DETAILS BETTER) The perfect comfy bralette to wear under everything, featured in a sweetheart silhouette with a stretch fit that forms to your body. • Low back • Plunging neckline • Elastic underband Care + Content Machine Wash Cold Made in the USA • 8% Elastane • 92% Nylon