Mens Red Microfiber Math Mathematics Equations Butterfly Self Bow Tie This one's for you, math nerds. Our Math Equations Butterfly Bow Tie features tons of equations written in white atop a red background Dimensions 2.25'' x 4'' Made of Microfiber Neck Size: 14.0'' - 19.0'' Perfect for math teachers. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!