Cross Stitch fabrics are all measured in inches eg 14 count is 14 threads to an inch and this handy gauge will help you work out the count size of your fabric. It also shows how many strands of thread to use for each fabric count, what size needle is best, plus it has an 8 inch ruler. It has gauge marks for 10, 11, 14, 16, 18, 20, 22, 25, 28, 32, 36, and 40 count fabrics. Hold the gauge to your fabric and match the lines to find the fabric count. Very handy if you find a remnant piece of fabric in the bottom of your stash and want to work out what count it is.