I recently saw these bags in an article in a Martha Stewart Food Magazine... I fell in love with them!! I am so tired of buying sandwich bags and throwing them out!! I hate it!!! So these bags were fantastic. I can re-use them and throw them in the dishwasher and have a clean bag for my husbands lunch every day! The large bag fits a big, hearty sandwich.(no more squeezing it in a baggie) and the smaller bag is great for chips, carrot sticks, cookies or anything else that fits my fancy!! I paid 24.73 for the 4 bags and shipping cost as well. I am not a math person, so not sure how many boxes of sandwich bags I'd have to buy to make this work. But the Green Factor is what really sold me.