REPLACEMENT TILES: An extra set of 90 wooden number tiles for the WE Games Sudoku game - ASIN B000JLXEWQ. An individual wooden tile measures 0.75 x 0.75 inches. MADE TO LAST: Each tile is crafted using durable natural wood. These tiles are made to withstand years of play. WE Games offers a 60 day guarantee on all products! DOUBLE SIDED: Every tile is numbered and double sided for great versatility. The numbers are outlined in red and black coloring. GOOD FOR YOU: Did you know that playing board games can teach important social skills like verbal communication, being patient, sharing, taking turns and enjoying interactions with others? Games like Sudoku foster the ability to focus and lengthens the players attention span. Playing games is an easy and excellent way to spend unhurried, enjoyable time together. They are also rich in learning opportunities. WE GAMES: Making the world’s best traditional games since 1977. Our games are crafted with high quality sustainable materials with attention to fine details. We love bringing people together with our classic board games, and we know the joy of the game will be passed down to the next generation. WE Games donates time and resources to the Toy Foundation to help children in need who are facing many of life’s most difficult challenges.