National Pi day can be celebrated more than just one day a year with these Mathematical PI 3.141592653 Dangle Earrings!! Each nerdy pair of these Pi Earrings are made from extremely lightweight black acrylic! Pi Pendants measure 1.25″ wide so all your friends will finally be able to remember the 1st 9 numbers of Pi!! You get to choose which hypoallergenic earring hooks these are made with! Choose from: ~ Nickel Free (Shown in Pics) ~ Clip Ons Show your friends just how much you love math and pi or give to you best geek friends!