New Era, Authentic Collection, the Official Cap of Major League Baseball --- the cap worn by every MLB player on the field can also be worn by the smallest of fans.*Top of the line all cotton 59/50 cap with Swiss embroidered official team logo on front center of hat.*Official MLB logo on the back.*Flex-fit technology allows hat to expand to fit almost any toddler*Hat is equivalent to a 6-1/4 fitted sized hat and measures 19.75'' (50cm) in circumference