The cool thing about arts and crafts is there is no wrong or right way to make things. You can make your cosmetic bag however you want to. You are going to need to pick out the fabric you want to use first. There are even some pattern kits you can get at the store that will show you how to fold, cut and sew the fabric to make the cosmetic bag. Here is a short tutorial video on how to make a cosmetic bag: http://www.youtube.com/watch?v=8BrtcXAzeBU.