I have just finished making the "goody bags" for Blaze's birthday party next month.
To make draw-string bags this size, cut out two panels of your chosen fabric, that are 10-inches by 7 1/2-inches. Measure two-inches from the top of the panels (one of the 7 1/2-inch sides) and clearly mark it.
Place the two panels together, right sides facing each other, and sew together, starting at the two-inch line and ending on the other side at the two-inch line, leaving the top unsewn.
Sew down the raw edges from the two-inch mark to the top. so that the opening there is evenly matched with the seam.
Cut two lengths of ribbon, 16-inches long. Fold the top edge of one side of the bag over, so that the edge rests along the 2-inch line. Crease to hold it in place. Place one length of the ribbon inside the fold, right along the crease. Sew the fold in place along the bottom edge, forming a casing for the ribbon.
When both sides are complete, tie the two ribbons together and turn the bag right side out.
For the design on the front of the bags, I used the artwork from the free printable airship mobile from the Girl Genius webcomic site:
I transferred the images onto a Word Document and adjusted the size until four airships fit on each page, then printed out the pages on iron-on transfer paper made for dark fabric.
We still have the mobile we made from these same designs for Blaze's birthday last year.