Introducing the pen case which becomes a book mark band for any notepad or book. Keep your pencil case and notebook in one place with this smart, compact and fun book band pen case. It's compact in design yet spacious enough to carry 4-6 pens or pencils, plus a couple more on the outside slip pocket. This fun yet functional design will make a great talking point amongst stationery lovers. Fits books from B6 through A5 size thanks to an adjustable strap. The pencil case itself is made from a silicone, combining texture and durability that will wear well over time. This Japanese Stationery product is both fun and functional and is sure to make the perfect unique gift.