Rainbow Derbies (One Dozen) by CarnivalSource.com! Show your support and pride with these rainbow swirl derbies. These economical party hats are perfect for parades and other large events. Stock up on all your costume accessory and hat needs with CarnivalSource.com. We have a wide selection of novelty, career, costume and whimsical hats to suit any occasion. You'll be sure to find the right hat for your next party or costume with CarnivalSource.com. Find more great items like this in our Rainbow Party Theme category here at CarnivalSource.com. Rainbow Derbies (One Dozen) by CarnivalSource.com are the perfect accessory for any parade or large event. These one size fits most adult derbies are made of plastic, with a rainbow swirl design and an inside circumference of 23 inches. The outside hat dimensions are 10 1/4 inches long x 9 inches wide x 3 3/4 inches high. Ships from Missouri warehouse within one business day. Stock up on all your costume accessory and hat needs with CarnivalSource.com. Find more great items like this in our Rainbow Party Theme category here at CarnivalSource.com.