Hot Leathers Official 2015 Sturgis Motorcycle Rally 75th Anniversary Stovepipe Top Hat Skull Patch Only sew onto Leather Materials. It can be ironed onto other materials but it must Not be ironed on to leather. 4 inch by 4 inch. Hundreds of Hot Leathers Patch in Store. Embroidered patch with heat sealed backing Easily sewn or applied to any garment. Officially licensed Sturgis Motorcycle Rally 75th Anniversary patch.