Halloween // Will a 14-16 y/o costume fit me?

I (18m) want to buy the diamond armor costume with my little brother. His birthday theme is minecraft and I wish to be able to match with him (11m). I’m 5”6’, 110lbs and skinny. I tried to look for any adult sized costumes of it but they’re sold out? Does anyone know where I can get an adult sized one or will the 14-16 y/o version fit me?