Finished size 49 x 21cm
STEP 1 Cut a piece of fabric to 51 x 70cm. Zigzag stitch around all edges.
(If you already have a bolster insert, cut fabric to measure length and circumference, then add 2cm seam allowances all around.)
STEP 2 To insert zipper, press under 2cm of seam edges on long sides. With right side facing up, align one pressed edge with zipper teeth and pin in place. Using zipper foot, stitch zipper to fabric, 5mm from teeth. Open zipper. Repeat to stitch other side of zipper to other pressed edge of long side of barrel panel. STEP 3 To make piping, refer to How to make and sew piping (right). Using scissors, snip 8mm into cut edge of piping at 1cm intervals. Repeat for other strip.
STEP 4 To make bolster ends, cut two 23cm circles (the diameter of the bolster plus 2cm seam allowance). Zigzag stitch around all edges. Working on right side of fabric, pin snipped edge of piping to cut edge of circles. Using zipper foot and 1cm seams, stitch around edge of circle as close to piping as possible.
STEP 5 Working on wrong sides and with 1cm seams, stitch bolster ends to bolster barrel, ensuring zipper is open prior to stitching second end for turning through.