Abercrombie & Fitch Shirt With A Floral Design. Size ST On an Abercrombie & Fitch (or other brand) shirt, "ST" almost always means Small Tall, indicating a standard small size but with extra length in the torso and sleeves for taller individuals, while it could occasionally mean "Standard" for "one size fits most" but usually "Small Tall" is the intent for a specific fit. There is a light stain at bottom of the shirt. Please see picture