If any one wants a really cute, perfect size bag, you should go to Karlee's Shop (I don't know her, I just love her stuff). She sells these bags on her shop, but she also sells the pattern. I bought the pattern and I have made about 10 now. These are just a few.
I have given them as gifts to little girls as a "sleepover bag" and filled them with travel sized toiletries.
I have given them as a teacher gift, as a diaper bag, and my girls use them as a church bag.
If you're looking for a simple sewing project or a cool gift, go for it. If not, just buy one already done. She uses really cute fabric!