That might sound like a minor issue, but I'm wondering, what's the point of this paper?
The bigger squares are 1.2cm, and the smallers 4x4 are 3mm wide. It's originally a Spanish notebook.
I'm aware of multiple layouts for graph paper for different purposes: Chinese (stacked squares), Chinese training (stacked blocks, subdivided in 4 field), logarithmic paper, 10x per centimeter for design, 5 square/inch in the US, 4 squares/inch, French ruled paper, slanted grid for calligraphy, and so on.
But this seems like a unique design. Any idea, what's the intended audience?