Features: Made of harmless and healthy beech, made with environmentally friendly water-based paint. Add 81 thinking tiles and double-sided tiles for trial and error. Comes with a drawer container, easy to store and carry around. Strengthen analytical and logical skills, think calmly and relieve stress. Free instruction manual with 100 questions and answers and 9 spare tiles for you. Specifications: Material: Beech Color: Blue Weight: 750g Size: 22.5*22.5*3.3cm/8.9*8.9*1.3in Package List: 1* Sudoku Board 1* Instructions for use 81 * TilesNote:1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding. 2. The color may vary due to different monitors, please understand. Note:Hello, please pay attention to your delivery address when purchasing products. If your receiving information (such as: name, street, house number, doorbell/email without name, etc. is incorrect, the order will not be delivered correctly.)