Amazon.com: Disguise Kai Costume for Kids, Deluxe Lego Ninjago Legacy Themed Children's Character Outfit, Child Size Medium (7-8) Red (100409K) : Toys & Games
LEGO Ninjago Costumes - HalloweenCostumes.com
Disguise Kai Lego Ninjago Movie Classic Costume, Red, Medium (7-8)