Mounting
Knit a single crochet edge around the two pieces. Crochet 3 single crochets in each corner.
Finish with 1 slip stitch. He cuts the thread and finishes off.
Place the pieces together, wrong side by side, and knit them together as follows:
Start 5 cm from a corner. Insert the crochet hook into one loop of each piece and crochet the pieces together in single crochet.
Knit until the end, and tuck in the cushion before knitting the last side.
Sew a button on each side in the center of the cushion.