Trolls Costume Etsy Trolls (World Tour) costume DIY! Troll costume diy, Troll costume Easy Troll Doll Halloween Costume 93 best Troll costumes images on Pinterest Troll costume, Costume. One size fits most adults. Perfect for Halloween or Carnival season. Easy and simple one piece slip on. Fan inflates costume in seconds & lasts up to 7 hours. Requires 4 x AA batteries (not included). Assume your position under the bridge and get ready to scare all of your friends in our inflatable Troll costume! This hilarious costume is one of a kind and sure to steal the show at your next party, It's is especially good for Carnival season or Halloween!