The Clairefontaine Clothbound Pocket Notebooks have 90g smooth ultra white paper that's fountain pen and marker friendly. Its sheets are micro perforated and held together by a sturdy cloth spine for strength. The cover is made of waterproof laminated cardboard. Paper is acid free and pH neutral.
Notebook has 96 sheets (192 pages), and measures 3.5" x 5.5" with ruled pages.
They come in assorted colors, so let us choose for you.