Black Widow Spider Gauge Swatch Measurement Ruler In Inches And Centimeters -Maple Wood With Bronze Clasp - For Knit And Crochet, Fiber Arts This black widow spider walking up a branch of flowers gauge swatch ruler easily clips onto your knitting bag or key ring. The gauge, which measures 3x3 inches is made from maple wood and has a two-inch ruler and a five centimetre guide. This is a great tool for those who love watching dragonflies and other flying insects. To use the tool, hold it up against your stitch work and count how many stitches fit inside the cutout area. By placing the tool over your work you can see how many stitches you have per inch and per centimeter. The bottom slot measurements are in inches and the side slot measurements are in centimeters. The bottom is used for the stitch gauge and the side is used for the row gauge. This ruler is great for all fiber artists.