Rubie's Official Marvel Avengers Endgame Captian America Deluxe Childs Costume, Kids Superhero Fancy Dress

Roughly what ages would the size 'L' fit? Thanks

Want to by this for my son who is 4 and average size, but worried 3-4 will be too small but 5-7years too big!!?? Please help!

There seem to be quite a large cap in the sizes. I want to get a suit for a boy thats 120 cm (47 inches). what size would you recommend?

is it a one side mask (only I the front with no back) or is it a helmet?