Pokemon: Eevee Evolution Costume Hat - Jolteon Electric This is a fleece costume hat from the popular animated series, Pokemon! Featuring the popular Eevee Electric Evolution - Jolteon! Yellow with a fierce stare just like the actual Pokemon! The hat is available in a single size, and measures about 24-inches around total. Its a great item to wear for a costume or to keep warm. Wear the hat and show you're a Pokemon fan! Dimension & Measurement: One size available, Approx. 24-inches