Knit kits sock rulers make sock knitting a snap... literally! With shoe sizes on one side (with negative ease already calculated) and inches and centimeters on the other side, they'll work for all your measuring needs.
These sock rulers snap flat so they can be inserted into your socks for accurate measuring and then snap shut so they can fit into even the smallest project bag.
When not using, snap it around your wrist or a ball of yarn!!!
