The costume is cute but the product photo is misleading and the helmet just doesn't work at all.  The eye slot is too high relative to the nose air holes, but worst of all, the helmet is flat-fronted so the poor kid's nose has to be smashed the whole time!  It probably could be jerry-rigged to work if you put pads at the place where the kids cheeks are so as to push out the helmet, but since the eye slot is too high anyway, it's not worth it.  In order to see, the helmet has to be pushed down, so the kid's hair is clearly seen, which was not what the photo leads you to imagine.  Finally, size 8-10 is right for a 7-8-year-old.