I have noticed that the baggers at the grocery store will fill up my cloth bags to the max. This makes the bags quite heavy to lug in and out of the car and then into the house. I have made a bag pattern that is wider and shorter than the ones I have been making, see my tutorial. You can see the size comparison in these two pictures.
The pattern is 18 1/4 inches wide and 16 1/4 tall. I cut out a 2 1/4 inch square at each side for the bottom. The handles were cut 4 inches wide and 26 inches long. Since the bag is wider I spaced the handles 6 1/2 inches apart. The assembly of the bag is the same as in the tutorial. For the one in this picture I added a 6 inch band at the bottom to give it more strength.