I submitted something to the magazine Saikyo no Norimono Heroes and was selected, so I received this as a gift. I opened it to take pictures, but it's unused. It has a Shinkansen (bullet train) design printed on it, so if your boy likes it, please go for it! The size is probably free. It has a hook on the back to adjust the size. *It might be a little big for small children. #SaikyoNoNorimonoHeroes