This book mark is A4 size, it contains about 200 pages numbered with small squares. The pages are a little beige color and are thus of 80 grams of good quality. They are not detachable. There is a spring to close the book and what to put pen on the side, and two bookmarks one white and one black. In short, a beautiful book to take notes during meetings or for business because it allows for storing business cards inside of its cover. A beautiful product, can be a bit expensive ...