Sturdy leather hard shell-high-quality hard shell, making the notebook more durable and more comfortable to the touch. The durable hard shell will help protect the pages inside and provide a comfortable writing surface.100GSM thick paper, very suitable for pen and ink, no bleeding. The sturdy binding design will not let the page fall off the cover.Perfect pocket size-each mini diary is equipped with 3.5" x 5.5" A6 size, which is convenient to carry around. It fits in a back pocket or purse. It is very suitable as a travel diary, business notebook, university course notebook, daily diary, notepad, etc.Compact-This compact notebook is very suitable for business executives, students, adults, scientists and many other people in the field of work and learning, whether you are at work, at home or at school.It can be used as a traveler's notebook, diary, diary, notepad or diary, etc. With this small notebook, you can quickly record any inspiration you think of, and keep your list and schedule regularly.