Crochet hook can be used, if preferred, to create vertical chains for finishing the plaid motifs.

You will also need a cushion insert in the same size.

Yarn used:
Rowan Pure Wool Worsted
A. 197 Teal - 1 ball
B. 200 Verdant - 1 ball
C. 201 Tiger - 2 balls

Shade C is also used for the solid back piece.