I liked the look of this slipcased set of notebooks:

From the product description:

The design of this set of three notebooks is adapted from works by the German artist Marcel Odenbach (b. 1953). The notebooks are packaged in a stylish slipcase, each notebook has a different cover and contains either 64 blank, lined or graphed pages.

They’re 6″ h x 4.25″bw x 1″d, $18.95 or $17.05 if you’re a member. More details at MoMA Store – Odenbach Set of Three Notebooks.