HONGTEYA kids\' sun hat is the best investment you can make in sun protective wear for your children or grandchildren!  Sun hat for kids has two sizes:  Size S: 3-24 months fits head circumference 17.7-19.3;  Size M: 2-7 years fits head circumference 19.3-21.3.  It\'s hard to beat the enjoyment of a day in the sun, unless it\'s a day spent in the..