Red Moleskine Cahier Journals for pocket notebooks:

https://a.co/d/4Gjov7f

My Wallet that carries my pocket notebook:

https://a.co/d/5oxsrG6

Lochby pocket notebooks:

https://www.lochby.com/collections/notebooks/products/pocket-size-notebooks-4-pack

Parker Settecase (Youtube: Park Notes) talking about pocket notebooks:

https://youtu.be/f_MddQW3U5E?si=h9Skkrvwz8ipvwhw