Under Armour Kids Polo (Red) Size: Youth Large. Orig. $30 Keep your little one in a polished look with the Under Armour Kids Performance Polo (Big Kids). All Under Armour® Apparel features a tagless design or tear-away tag with no left-over pieces. Short sleeve collared shirt with a straight hemline. 100% polyester. Machine wash, tumble dry. Imported. Product measurements were taken using size XS (7 Big Kids). Please note that measurements may vary by size. Measurements: Length: 18 1⁄2 in