Sakura Craypas Ballsign ID Gel PenAvailable in a wide variety of color variations with black ink. iD design for a new feel that fits your hand. The special shape combines hexagonal and round shape to allow the pen to gently touch the finger, providing a natural fit High quality and stylish design that is easy to use even in business settings Specifications: Ball diameter: 0. 4mm or 0. 5mm Body Size Weight: 5. 7 x 0. 5 inches (14. 5 x 1. 3 cm), 0. 4 oz (12 g) Clip: Stainless steel