Shop Baby's at RalphLauren.com, the Official Site of Ralph Lauren. Big Pony Cotton Oxford Shirt - Crafted from soft cotton oxford, this cute shirt features our signature embroidered Big Pony. Button-down point collar. Applied buttoned placket. Long sleeves with buttoned barrel cuffs. Box-pleated back yoke ensures a comfortable fit. Our signature embroidered Big Pony accents the left chest. 100% cotton. Machine washable. Imported.