It fits with a strap under the neck to secure in place.
Design & DetailsThis adult costume is a Made By Us exclusive that lets you become a part of your favorite board game. Once you have it on, you'll become the hungriest Hippo around!A Winning StrategyIf you want a winning strategy for Hungry Hungry Hippos, then choose yellow! The costume comes with a jumpsuit, hood, a pair of mitts, and a pellet necklace to help you transform into the Yellow Hippo. Yellow is HungryThey might tell you it doesn't matter, but it totally does.