This hat works great for kids. The child it is shown on is 4 and it fits her with some room to spare. The size inside the hat is 6 3/4. Olive drab original boonie style hat cap in mint unissued condition. This hat has a snap on right side to allow the wearer to get the brim out of the way for aiming. Hat dsa 100-88-c-0481 NSN# 8415-082 5484 M & B Headwear Co.