Features: Boosts vocabulary retention with this 5 pack portable vocabulary notebook featuring the scientifically prove Ebbinghaus Curves design, offering a compact format for efficient on the go learning. Each page includes innovative cover flap for selftesting and paper that resists bleed through, ensuring smooth writing with pens or gel markers. Ideal for students, professional, and language learners preparing for exams who require organized, space efficient study tools. Designed for quick reviews during commutes, study breaks, or coffee shop– its pocket sized profile slips easily into laptop sleeves or bags. Optimize learning versatility with 5 interchangeable notebooks featuring lay flat bindings, perfect for tracking progress across subjects while maintaining structured note organization. Specifications: Materials: Paper Size: 12.8x7.4cm(5.03×2.91inch) Package Includes: 5 × Memorizing word book portable notebook note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.