Made of strong, rigid acrylic that 't bend, warp or . High quality stitched ruler, light color allows easy visibility of holes and fabric underneath. The needle is easy to enter, and the scale line is more obvious, which improves the accuracy of sewing work. Dimensions:This is a 2.5inch x 5.5inch sewing ruler that can also measure small pieces of other items. the sewing guide under the presser foot to position the needle into the hole for an accurate . COMPATIBILITY:It is compatible with all quilting and sewing machine makes and models. It is a must have for quilting supplies. Package includes:2pcs sewing guides for your sewing needs. Colour:Green & Transparent Material:Acrylic Size:16x8x1.5cm Package Contents: 1 * green perforated sewing ruler 1 * Transparent Perforated Sewing Ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.