These little (well not so little) shopping bags are great to throw in your hand bag to have on you all the time. I know I'm a great one for when I'm out an about and we just pop into the shops on the way home, No bag!
So little bag is great for that. when all folded up it only measures 10cm x 5cm so nice an compact. When unrolled measures out to 38cm x 40cm, you can fit heaps of shopping into them.
Also when you buy one of these bags you will be doubling up helping the environment as they have been made from fabric sourced from the op shop bought home washed and sanitized and lovingly sewn up into shopping bags.