The Blue Heart card offers a variety of specifications to meet different application needs. Common specifications include various thicknesses (such as 1.0mm, 1.5mm, 1.9mm, etc.) and sizes (like standard puzzle dimensions, custom sizes, etc.). For instance, some Blue Heart puzzle boards can reach a thickness of 1.9mm, suitable for puzzle toys and game cards that require higher strength and flexibility.Blue Heart Cards are widely used in puzzle toys and game cards. They are not only excellent aids for children's intellectual development and entertainment but also a great choice for adults seeking leisure and relaxation. Moreover, Blue Heart Cards can also be applied in various fields such as education, advertising, and decoration, including creating educational puzzles and advertising displays.