Worked toe-up with a short-row heel and mock gusset.

Finished Size
XS (S, M, L, XL)
Sock’s foot circumference: 6 (7, 8,
9, 10)“ (15 18, 20.5, 23, 25.5 cm) to be worn with about ½” (1 cm) negative ease.

This fabric has less stretch than Stockinette, and for comfort, the socks need to be a little larger than for plain fabric.

Yarn
Fingering weight (#1 Super Fine).
Shown here: Leading Men Fiber Arts Show Stopper (75% superwash Merino,25% nylon; 463 yd 423 m/3½ oz 100 g): Seaweed (MC), Metamorpho-sis (CC), 1 skein each.

Needles
Size U.S. 1 (2.25 mm): Your preferred configuration for small circumference in the round: DPNs, long circular for magic loop, 2 shorter circulars, set of three flexible DPNs, 8–9” (20–23 cm) circular.

Adjust needle size if necessary to obtain the correct gauge.

Notions
Stitch marker; yarn needle.

Gauge
32 sts and 48 rnds = 4” (10 cm) in Stockinette st.

ERRATA
Left Slant—Work Bias Motif in the Rnd with MC and CC 
Rnd 3: With MC, k1, sl1, [k3, sl1] to end of instep; k to end of rnd.
Rnd 4: With CC, k1, [SSK, K2, M1R] to last st of instep, k1; k1, M1L, k to last 3 sts, K2tog, k1.

HEEL - Short row 10: (WS) Sl1wyf, p to last 12…