Patrick Ng reports about a series of notebook covers by the Japanese company Kokuyo:
"The Systemic series has 3 sizes (B5, A5 and A6) and two colors to
choose from. Although the cover is specifically designed for Campus
notebooks in the same sizes, I found that the A5 and A6 versions also
work well with Moleskine's large and pocket size notebooks.."
View the original image and learn more at Patrick's FLICKR page.