With a sock ruler, measuring the length of the foot or the shaft of your sock becomes a breeze. You’ll know exactly how many more rows to knit before you need to start shaping the heel or the toes. If you’re knitting two socks at once, the ruler will also help ensure that the socks will have the exact same length.

This sock ruler is made of wood, making it decorative as well as practical. As another cool feature, the ruler has a needle gauge that measures needles from 2 to 10 mm, as well as a small 10 cm (4 in) “window” that comes in handy when it’s time to count your stitches and measure your knitting or crochet tension.