Based on this product's specifications, here are some alternatives and similar models
Notepad INTERDRUK A5 squared grid, 50 sheets, writing pad
Summary description:
INTERDRUK A5 squared notepad with 50 sheets designed for writing, note-taking and sketches. A compact A5-format pad with grid ruling suitable for math, diagrams and daily notes. Glue-bound at the top for easy page removal; lightweight and portable for school, office or home use.