Adopted of acrylic material for your use. The Quilting Ruler is with different shapes that is sure to help with your projects. Great for sewing, embroidery, quilting, patchwork and other DIY handmade crafts. Features -Color:Assorted Color -Material:Acrylic -Size:18.30X18.30X0.20cm/7.19X7.19X0.08in - Acrylic material, convenient to use. You can give them as gifts to a DIY knitting lover, which is very practical for them. - Small and delicate, convenient storage, does not take up much space. The reasonable design make them easy to operate and use, and the application are simple. - Healthy material, safe and assured. Rounded edges and corners, not easy to scratch your skin. - Mainly help to determine stitch gauge, count stitches and rows. Suitable for professional or personal use. - Easy to Use: Just place it on fabric to measure how many yarns are still needed. You can also use it to measure the required needle. Package list: 3 x Knitting Ruler