Start with:
1 x 7.5” x 21” fabric (outer – avoid directional prints)
1 x 7.5” x 21” fabric (lining) or you could use just 1 x 7.5” x Width of Fabric (inside and outside will be the same).
1 x button or snap fastening.
How to make.
Cut your fabric, and lay right sides together.
At one of the short ends, measure 1” each way from one corner, mark a diagonal line between them, and cut off the resulting triangle through both pieces of fabric. Repeat for the other corner at that short end. This will form the shape for the flap.
Pin if desired and start sewing the two pieces together using a ¼” seam allowance, starting about half way down one of the long sides. Sew almost all the way round, but be careful to leave a gap of about 3” to turn the pouch through.
Clip the excess fabric from the corners and turn through.
Press neatly.
Top stitch along the straight short edge, 1/16” from the edge.
Fold the straight short edge up 8” to create the pouch and pin. (if you are confident with the positioning you can add a button or snap to the straight edge before you do this).
Starting at what will now be the bottom of the pouch, top stitch, 1/16” from the edge in one continuous line from the bottom of the pouch, right up and around the flap and down the other side to the bottom of the pouch of the opposite side. You may wish to ‘forwards and backwards’ to reinforce the start and end of the stitching, and perhaps at the top edge of the pouch too. This top stitching not only forms the pouch sides, but also seals the gap where you turned through the pouch.
OPTIONAL: Measure a line 3” up from the edge of the flap and sew across this line. It will help the flap to hang neatly but isn’t definitely required.
Make the correct size button hole at the appropriate place on the flap, then sew the button to the pouch OR add the second part of the snap. (Just for information, when I make these I put one button in the middle, 1” to 1 ¼” from the top edge of the pouch, and the button hole 1” up from the lower edge of the flap).
Admire your lovely pouch!