With a ruler in inches and millimeters, you can easily determine the size of the sweater or socks you have knitted Each gauge lists both crochet hook and needle in standard us and millimeter size Small in size for easy storage and travel to easily store in a handbag The sewing and knitting tool ruler is for tyro to begin sewing on their own with the help of ruler Quick & accurate hook and needle measurements, check your crochet hook and knitting needle size with perfectly calibrated gauges, Manufacturer: BUBEFSKD