Two Tone Numbers are the most popular letters that give a great, authentic look to your jersey. More colors mean more quality. Each number comes prepositioned, one color on top of the other. These are 2 layers with 2 colors. Pro Sports Baseball, Hockey, Football, Basketball Numbers & Letters. Can be used for little leagues, colleges, organizations, etc. Quick shipping, quick turnaround time. Iron on letters and numbers first, then simply sew or stitch around the edges for a permanent hold. Pro Patches USA has top quality authentic sports twill at the best prices on the net. Order 1 or 1000, it doesn't matter. Price discount given on quantities. Each number or letter can be used as an iron on application, or a sew on/stitch on application. Ironing on each character, will have a temporary hold, however sewing or stitching on will be permanant.