This night sky stars over an amanita mushroom gauge swatch ruler easily clips onto your knitting bag or key ring. The gauge, which measures 3x3 inches is made from cherry wood and has a two inch ruler and an five centimetre guide. To use the tool, hold it up against your stitch work and count how many stitches fit inside the cut out 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 side slot measurements are in centimeters. The bottom is used for stitch gauge and side is used for row gauge. This ruler is great for all fiber artists. Side note: If you need more stitches per inch, swatch with smaller needles and if you need fewer stitches per inch, swatch with larger needles. Since each piece of wood is unique, item you receive may be slightly different from photos.