Hot Leathers Spade Skull Patch (Multicolor, 3.5" Width x 3.5" Height) Only sew onto Leather Materials. It can be ironed onto other materials but it must Not be ironed on to leather. 3.5 inch by 3.5 inch Embroidered patch with heat sealed backing Perfect for leather jackets and leather vests. Easily sewn or applied to any garment