The Logical Air notebook was a 2015 award-winning Japanese design and is available in two sizes: A5 and B5. The 70gsm paper is not only fountain pen friendly, but also is printed with a proprietary system of line/dot/grid giving you the ability to write, align, diagram as precisely as you want to be!
Available in 2 sizes including:
A5 (5.8" x 8.3") | 30pgs
B5 (7" x 9.9") | 30pgs