Envy Round Needle Gauge

KnitPro Knitting Needle Gauge Envy 2-12mm (0-17 US) can measure the size of your knitting needle if you are in doubt. You put the knitting needle into the holes to find out what size the needle is. Once you find the correct size, the needle will go in effortlessly. If it can't go in, the size is too small for your needle. If there is air around the stick, the size is too big.