6 [6.5, 8, 9, 10]″ / 15 [17, 20, 23, 25]cm leg and foot circumference. Measurements taken after blocking.
Size 4 shown on a size US 13 / EU 47 size foot that has a 10.5″ / 27cm foot circumference. The sock fits with 1.5″ / 4cm of negative ease.
Socks are designed to fit an actual foot circumference of 7 [7.5, 9, 10, 11]″ / 18 [19, 23, 25, 28]cm. The socks are designed to fit with negative ease. Choose a size with a finished foot circumference measurement that is approximately 1″ / 2.5cm smaller than your actual foot circumference, so that the sock will fit nice and snug on your foot.
The lengths of the cuff, leg, and foot are easily customizable by knitting more rounds for a longer leg or foot or fewer rounds for a shorter leg or foot.
