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You can make roses out of silk, satin, or ribbon, as long as they don't have any wires or framing inside of them. Pick a material that is pink or red for a traditional color, or use white, blue, or even green for a festive look. You can find satin, silk, and ribbon at most party supply stores. Materials like ribbon or silk usually come in long strands that are hard to work with. Use a pair of sharp scissors to cut your material into a manageable size. Cut the material at an angle to avoid fraying. The cut you make doesn't have to look perfect, since it will be hidden inside of your finished rose. If you want a larger rose, use more material. Pick up the folds that you made in your material and keep them pinched together with your thumb and pointer finger. If the material comes loose, it will fold out into an accordion that you can simply fold back up into a square.
Choose a material without wires that is 18 inch (0.32cm) wide. Cut your material to about 8 inches (20cm). Pinch the stack of folds together with your fingers.