New York Yankees World Series Champions 27in x 37in Team Banner Flag. Hey baseball fans! We now offer the officially licensed 27in x 37in New York Yankees World Series Champions team banner flag! This impressive flag is 100% printed polyester, vibrantly colored, and very durable. It will look great hung at home indoors as a decoration, outside on a pole. This is a great flag, it's affordable, makes a great gift, and it's also made in the USA!