Fold the canvas fabric in half with selvage edges aligned. On one end of the fabric, measure and mark 13” from the folded edge. And then on the other end, measure and mark 28” from the folded edge.
Using a long yardstick, draw a line using chalk or removable wax connecting the marked spots. Cut along the marked line to create a trapezoid shape when fabric is unfolded.
Finish the straight edges of the cut fabric (the short side is the top and the long end is the bottom of the hammock chair). Fold edges in 1/2” and press. Fold again another 1/2” and press, then stitch the hem in place.
Along the diagonal cut lines, fold edges in ½” and press. Fold again another 1 1/8” and press. Pin along the folds to hold in place while sewing. Tuck in the extra bulk on the ends where the edges don’t align.
Stitch the hem in place forming a wide channel for the rope to be threaded through.
Add an extra triangular stitch at all 4 corners for added strength.