This ruler is made from wood material, which is safe without strange smell. Mainly designed for measuring knitting intervals and density of the combined sample. The fixed width on both sides of the ruler is moderate, which can ensure the stability of rope knitting. Features -Color:Beige -Material:Wood -Size:20.00X5.00X0.50cm/7.86X1.97X0.20in - Made of wood material, it is durable and practical for use, and it is able to be used for a long time. -This product is a great accessory for sewing or knitting, suitable for measuring knitting intervals and density. -With the lightweight and compact size design, it can be easy to take and store. -This sewing ruler is easy to use, making it a must-to-have for your knitting projects. -The ruler is rectangular in shape, which is convenient for accurate measurement during the rope knitting process. Package list: 5 x knitting rulers