Gakuran Cap: This hat will fit an average size head. The measurement is 58cm so a little more than 22.5 which is a very common head size The color is Dark Navy Blue. Inside is a lining. It's really well put together! You'll see I have a choice where the braided band is removed and vinyl tape band wrapped around the crown. Same price, same size just different aesthetic the Kepi hat is Grey Wool blend. Also these are 58 cm which is an average size. feels comfortable even if it is larger I have only the quantity left and might discontinue this item when I run out. The Skull pin has eva foam crossbones just stuck onto the pin point. The pin goes through the bones, through the hat and the pin back covers it on the inside. The pin back is halfway covered by the inner band of the hats and I cut out some plastic of the band so that the pin back can nestle into it and not make a bump.