One is 15 cm wide and 20.5 cm high, and the other is 2 1 cm wide and 30 cm high. Just buy it at this size. Can also be purchased with the book;
At present, there are hard leather and soft leather, but there are other forms.
A hardcover book refers to a book cover that is thick and hard and different from the page size. The material of the book cover is generally made of recycled paper, and the outer bread is decorated with other papers.
A paperback book means that the cover of the book is thick and soft, and the size is the same as the pages. The cover materials of books are varied. Nowadays, soft cover books usually have some glue to strengthen protection.
The size of general textbooks is fixed, and you can also make your own book cover, which is more fulfilling, environmentally friendly and saves resources.
Book cover, also called bookbindingandlayout, is an artistic and technical design of the form, material and production of a book before printing.
1, the outermost layer of books made of thick paper, cloth, silk, leather, etc. Thread-bound books can be used as bookmarks; Newly bound books and periodicals are usually printed with the title and author's name.
2. In order to protect the book, wrap a layer of paper or cloth on the outermost surface of the book.