CO 64 sts using 1 * 1 rib CO

Approx 5 cm of ribs

Stockinette st until the brown appears again

Heel: Knit one row, starting working YO SR heel on next row (so on 32 sts for a size 42-43. Take a look on it: https://schachenmayr.com/en/tips-tricks/basics-socks/sock...)
Startings as follows:
RS: k48, t+w
WS: p32, t+w
Next RS row: k to double st, t+w
Newt WS row: p to double st, t+w
Repeat these 2 rows 7 more times.

Next RS row: k to double st, knit it as a single st, t+w
Newt WS row: p to double st, , purl it as a single st, t+w
Repeat these 2 rows until last SR gaps.
Finishing with one knitted row to close last SR gaps.

Feet: Stockinette st until brown appears again. And I started to decrease as (ssk, k2, k2tog) on each side as follows:
k13, ssk, k2, k2tog, k26, ssk, k2, k2tog, k to beg of the rd

Then, on every other row 3 times once
On every row 4 times
BO: kitchener st