The format is the same for each of their publications. They are printed on heavy, glossy paper and they have minimal text and they feature excellent full color photographs of the shells that are covered in each section. The pages are A4 size and are not bound. It is difficult to find a binder that will fit them in the USA (sometimes you can order them from an office supply company) but you probably will want to order the specially printed binders to contain them. Each binder will hold (an average) of three sections. Here is a listing of what is now available and one that is due out soon. Heavy cardboard with printed logo & 3 inch rings