The Kutsuwa Mojisashi Reading Ruler 18cm, Gray, is designed to enhance your study sessions with precision and ease. You can focus on studying ruler features a clear window for easy reading, making it perfect for tracking lines of text without distraction.
 
Its 2-way usability allows you to use both the back and front, providing versatile support whether you're measuring or highlighting text.
 
Sized at 7.1 inches (18 cm), it fits perfectly from end to end of the B5 notebook, aligning seamlessly with popular study materials.