Shop Baby's at RalphLauren.com, the Official Site of Ralph Lauren. Short-Sleeved Polo Dress - This ultra-soft cotton mesh polo dress features cute ruffles and our signature embroidered Big Pony. Ruffled stand collar. Four-button placket. Puffed short sleeves with ribbed armbands. Ruffled hem. Our signature embroidered Big Pony accents the left chest. Comes with a matching bloomer.