Dong-a Miffy Oil Based Ink Ball Point Pen Excellent Writing Black (Pack of 24 Pens) Pen Type : Ballpoint Pen-(Balck ink) Pack of 24 Pens Point Size : 0.5 mm / Made in Korea Ink Type : Oil-based /Snap button type Size: approx. 155 x 10 mm (6.1 x 0.4 inches) It is very popular in Korea due to style and convenience.