When you need cool stuff to build that smart geeky style of you, create that style with our 3D-Brain brilliant pin. * 3D-brain pin for instant awesome, just about anywhere. *typical size for you 1.3*1.5 cm. *made with scratch-resistant brass material. *responsibly produced. Made to order, just for the smart you. PINING DIRECTION: For best style, pin it on your bag, pen case, or clothes.