"What about larger notebooks? Can we sell them on pocketnotebooks.co.uk?"
Simple really. This collection is for books bigger than the traditional pocket size. Are you looking at the wrong books? Or do you have the wrong pockets?
Leuchtturm 1917 Bullet Journal
Leuchtturm 1917 Hardback Metallic A5 Notebook
Leuchtturm 1917 Metallic A5 Jottbook
Leuchtturm 1917 Metallic A5 Jottbooks