Lock diary size: cover size: 21.515cm/(8.475.9 inches), paper size: 20.5cm14cm/(85.5 inches), number of sheets: 50 sheets/100 pages.Lockable password design: creative metal password lock, adding a touch of fashion 0-9 three-digit combination, hundreds of password combinations, good confidentiality.We use luxurious thick 100gsm impermeable paper to ensure a high-quality experience and no ink leakage when writing on both sides.Secret diary: durable, suitable for travel or personal secret diary. Beautiful and unique relief design, essentials for diaries, travel diaries, poetry works, creative writing, listing ideas, making sketches and drawings.Multiple uses: write down your goals and ambitions. Track your progress and celebrate as you complete each goalGreat for capturing ideasWrite down all your thoughts and thoughts immediately so that you don't lose those creative sparks.