Thor: Ragnarok Deluxe Adult Gladiator Thor Costume that goes to a size XL for more fun. When Thor: Ragnarok comes out in July, you know every cosplayer and movie buff is going to be scrambling to the stores to get the best Thor: Ragnarok costume. Look no further because you’ve found the right place. The Adult Gladiator Thor Costume consists of pants with boot tops, a padded tunic to make even the most out of shape person have muscles, a headpiece, and a cape. Be ready to fight crime as you look back in the mirror at the greatest Avenger ever.