Pen case even in putting the pen, would turn into eco-bag if I open! It is convenient for carrying around bulky. Pen case that would turn into eco-bag if I open even if you are still put the [Features] pen! Penn can accommodate 5-7 book pen case at the time. -At the size that fits easily into a notebook of A4 size, the shawl type, easy to carry bag at the time. And joint development college student circle as "L"Allure"! By the eyes of women own is a pen case cute design for women.