This is a health log stamp. I received it, and it's sealed in plastic, so it's likely unopened. Size: Width 13 x Depth 0.3 x Height 22.5 cm Brand: Kodomonokao Product Dimensions: 13 length x 0.3 width x 22.5 height cm A clear stamp that allows you to "stamp where you aim" because the stamp is "transparent." A stamp set to make recording your daily health fun. Size: Width 13 x Depth 0.3 x Height 22.5 cm Stamp surface: PVC Package: OPP Country of origin: China An acrylic block is required for use. (Available at 100-yen shops, etc.) Thank you for looking.