The pillow in made of wonderfully soft mohair yarn.
Needles US 7
Yardage 280 yds
Zipper 15 in
Gauge / Tension: Width 17 sts / 4 in

The idea of the pillow is that the other side is fabricated. If you want, you can knit both sides to the same.

Finished measurements:
Width 18 in
Length 18 in

This is ready very fast!