Patented Heat-Resistant Material: Made of high-quality resin plastic, this hot hem ruler withstands direct heat from both dry and steam irons without melting or warping—temperature safe up to 160°C and short-term resistant to 220°C. Perfect Size for Versatility: Measuring 20cm x 10cm, this ruler is larger than standard hem rulers, making it perfect for wider hems, pleats, and large fabric projects. Ideal for professional garment making and quilting. Accurate Metric Measurement: Features a clear centimeter-based metric scale for precise measuring and marking. Perfect for those who prefer metric units in tailoring, sewing, quilting, and crafting. TRANSLUCENT DESIGN: Put fabric under the ruler so that you can see the object clearly. Fold fabric over the top of the ruler to the desired hem depth and then pressing is faster and more accurate. SIZE: The new version ruler measures 20cm long x 10cm wide. Metric system makes the measurement more accurate and intuitive. Let's give full play to our creativity and use the hot hem ruler., Manufacturer: KEARING