Size 38. According to Alibaba. Com, the size of mlb cookie shoes should be greater than 1.5, so the foot of mlb cookie shoes 36.5 is 38. (Note: MLB is genuine from the United States, South Korea and mainland China. , and different genuine products have different sources and different trademark labels). Major League Baseball is the highest level professional baseball league in North America. 1903, founded by the National League and american league, is one of the four major professional sports leagues in the United States.