This handy tool does a lot of work for both knitting and crochet where swatching your yarn is essential for fit and previewing your created textile.
The ChiaoGoo Swatch/Needle Gauge made of the same sturdy white resin as our 13cm & 20cm needle gauges. It is a multi-purpose tool used to help determine gauge and measure your needle/hook sizes. In addition, there are handy conversion charts and yarn standards tables for reference. Simply place the tool on your swatch and count how many stitches/rows fit inside the cut outs (along the bottom for stitch gauge and up the side for row gauge).
The tool is double-sided for US/metric and knitting/crochet differentiation.