Wooden Color Chart Tool: The package includes 2 pieces of wooden temperature blanket reusable color charts, providing you with a convenient and organized way to keep track of your color scheme. Size Reference: The overall size of the wooden ruler is: about 13.5cm/5.3inch long, 5cm/1.96inch long, 3mm thick, hole: 5.5mm, ideal tool for hand knitting. Wooden Material: The wooden ruler has smooth edges, sturdy and durable, lightweight, and simple layout, allowing you to effortlessly explore a variety of color patterns and experiment with different yarn swatches. Scale: Each board has 10+1 holes and temperature zones, -5~96 scale markings, the back side is blank so you can make some important markings. It is a convenient tool for creative craft lovers! Convenient: This multifunctional temperature blanket color card can be used as a blanket or other knitting project planner and wool color card organizer, a must-have tool for all your knitting, crochet and wool related projects!