Going to take my nephew hunting this year. He is 8 years old and a little above average heighth. I would like to buy gear a little big for him. I'm not sure his exact size, but he can comfortably wear a medium size youth jacket and a large size youth is a little big. I need the following:

Jacket (light or heavy, waterproof a plus)
Boots (leather or rubber)
Pants or bibs (insulated and non-insulated, waterproof a plus)
gloves
hats, caps, etc
face mask, gaiters, etc.

Thanks!