- Polo Ralph Lauren Kids - Boys' Size Guide - Polo Ralph Lauren Baby Size Guide - Polo Ralph Lauren Kids - Girls' Size Guide - Keep them looking sharp in this soft and stylish Polo Ralph Lauren® Kids Oxford Mesh Polo Shirt. This Polo shirt's cotton mesh fabric features a heathered appearance similar to our signature oxford cloth. This regular fit pullover style shirt features a polo collar with buttoned placket and short sleeves with ribbed cuffs. - 100% cotton. - Machine washable. - Imported.