1、Safe Material: The wooden ruler growth chart is made of walnut wood, ensuring safety and durability without any harm to children's health. 2、Accurate Measurements: The ruler features precise markings, allowing you to accurately record your child's height as they grow, making it a cherished keepsake throughout their childhood. 3、Unique Decoration: The growth chart serves as both a practical tool and a stylish decoration, adding a touch of fun and whimsy to your child's room. 4、Easy Installation: Simply align the measurement board against the wall, marking the bottom at a distance of 70cm / 27.6in from the ground, and attach the 4 wooden boards to the wall according to the markings on the ruler. 5、Versatile Application: The growth chart can be used in children's bedrooms, living rooms, nurseries, daycare centers, and more, making it a versatile and meaningful addition to any space.