with size 10 needles:
CO 72
join the round
work in ss until you nearly run out of yarn
hold the yarn double and change for size 11 needles
BO

Then (2 months later, the idea came to me)

with size 8 needles pick up 37st in the height with silky yarn held double
and work basketweave for 60 cm
Fold in 2 & kitchener st to picked-up st.
This will prevent ss from rolling.
I hope so…

basketweave

Follow this stitch pattern:

Rows 1 and 5 (RS): Knit.

Rows 2 and 4: K5, * p3, k5; rep from * to end of row.

Row 3: P5, * k3, p5; rep from * to end of row.

Rows 6 and 8: K1, p3, * k5, p3; rep from * to last st, k1.

Row 7: P1, k3, * p5, k3; rep from * to last st, k1.

Repeat Rows 1–8 to create the pattern.