Slap on this Green Satin Sleek Derby Hat for a St. Patrick's Day Party. Dress up like a leprechaun and wear this Green Satin Sleek Derby Hat. The Green Satin Sleek Derby Hat is made of a foam core material, and is covered in green fabric, with a satin green ribbon around the base of the hat. The Green Satin Sleek Derby Hat has an inside circumference of twenty-two inches. We also have a Black Satin Sleek Derby Hat. We also have a Green Plastic Derby, or a Green Velour Derby.