These socks were designed to please everybody! This sock pattern is suitable for advanced beginners, just slightly more complicated that a vanilla sock pattern. The farrow rib pulls in quite a bit for a thick, squishy fabric just as in my Alpaca Farrow-Rib Mittens. Size details: Adult S (M, L, XL): to fit 7.25 (8, 8.75, 9.5)" 18.5 (20.25, 22.25, 24.25)cm foot circumference with about .75"/ 2 cm negative ease Gauge: 36 sts & 48 rows = 4" 10 cm in stockinette stitch Notions: darning needle, stitch markers This pattern was test knit in all sizes. Thank you Becky, Saguna, Rachel, Cait, Sabine, Jennifer, & Mari!