Paperblank notebooks are available in a variety of designs and formats. In addition, they have different GSM on paper depending on the size and whether it is soft or hard cover.
A tip is to use the filter on this page to quickly find the right one. In the filter, you will see that they are partly visible with Paperblank's own name on the formats. From smallest to largest are Mini, Midi, Maxi, Ultra and Grande. But we have also 'classified' these based on standard sizes that are most often used with the names like A5 etc. There are deviations but you get an indication of how big they are. In the Maxi size, there are only notebooks with a dotted insert. If you want to read more about differences in different sizes with measurements, you have the information here.
Here you will land quickly in the right department if you know which format you want. From largest to smallest: