Tula Pink Unicorn Head Straight Pins. Unicorns do exist in these Tula Pink fan-favorite pins. These 2-inch pins with Imaginarium Unicorn head will add an extra element of fun to your project. Package contains 30 Unicorn Head Straight Pins. Why would anyone use a boring straight pin when you could be using these? asks Tula Pink. I don't know either. It just doesn't make sense!