I needed something unique that I could stick right into the sock, hold it completely flat and provide a truly accurate measurement, whether knitting from the toe up or the cuff down - the answer to my measuring woes manifested ingeniously as the Sock Ruler! - Denise, Founder & CEO of The Sock Ruler.
The Sock Ruler is an innovative measuring tool for sock knitters. It goes inside your sock, allowing you to measure it flat for a more accurate measurement, in both metric and imperial. Easy to use, say good-bye to tape measure blues. Also handy for measuring mittens and gloves.
The Sock Ruler measures both cuff-down and toe-up!
Cuff-down it measures:
Toe-up it measures:
This is the junior size, containing two rulers; one for infants and one for children.
There is a great demonstration of how to use this tool by Susan B. Anderson here.