There are 2 holes on each end of the flatback gems, you can sew them on or glue them to fulfill your decorations, These flatback crystals can apply to decorate all kinds of clothes, such as wedding dress, evening dress, dance dress, skirt, jeans and so on. They are fit for all kinds DIY crafts, for example: applied to decorate shoes, headbands, art projects, headpieces, bags, pants, hats, costumes and more.