The size and inside page design varies depending on your needs, and they are very simple inside (that's what we liked about them) but colorful (cover choices) outside. But, what was intriguing and different about CIAK notebook is this little concave hardcover edge that fits the black rubber band perfectly to secure the journal together. (...not sure if these pictures above would be able to give you a good idea... but we were very much impressed and liked how it felt in our hands.) The concave hardcover edge design is their patent design!

If you go to their website, there is a flash animation of the notebook that might give you little more idea :)