For your headband, you'll want to use a knit fabric with a good amount of stretch, like with Cotton Jersey and Cotton Lycra. A few of my picks from the store:
Since each headband requires a very small amount of fabric, we also offer our Half Yard Cuts and our Mystery Mix 1/4 Yard Bargain Lots. This way you can practice sewing your headbands in various knit materials on a smaller scale.
~ Heather & The Girl Charlee Team