This is a vintage pink polo dress by Polo Ralph Lauren in a size small. Big pony embroidered on chest in navy blue. Preppy tennis prep look on this short sleeve mini dress. I can't read the content or care tag as shown. That said it looks like it is machine wash and my meet is that it odd cotton or a cotton blend. Slight wash wear on this vintage piece as expected. Classic look.
Approximate measurements:
Shoulder seam to seam: 13.75 inches Underarm to underarm: 17 inches Length: 30 inches