To construct the bands, I purchased 100% cotton fabric in a variety of prints. I tried to buy the patterns in sets of two so that each headband would have corresponding, but not matching, sides (two black and white fabrics, two brown and blue fabrics . . .). The shortest length the fabric store would cut is 1/8 yard, which is more than enough material to make several headbands. I cut two strips of material that were 16" long by 2 1/4" wide in the center, slightly tapering at the ends (see photo). With the right sides together, I stitched along the two long edges of the strips, with a 1/4" seam allowance. Using the flat end of a spare knitting needle, I turned the tube right side out, then ran the pointed end of the needle along the interior seams.
For the elastic, I chose thin, metal-free ponytail holders. I looped together two elastic hairbands by placing one over the other (like a Venn diagram), then pulling the overlapping center edges outward. I ended up with essentially a figure-eight of elastic with a knot in the middle. I turned in the raw edges of one end of the fabric tube, then inserted one of the elastic loops. Then I topstitched over the both layers of fabric, securing the elastic (see photo). I repeated this process with the second end. At this point, the headband could be pressed flat (although this is not really necessary). I tried several different techniques for attaching the elastic and this was really the easiest and most effective. I will probably be making headbands in every color now that I have the method worked out and I look forward to feeling a little less guilty about throwing my hair in a ponytail (at least I'll be accessorizing, right?). Shorter, narrower headbands in bright colors would be perfect for younger girls. Attach a loopy ribbon bow, or large artificial gerber daisy for a cute children's accessory. Be creative and enjoy!