SINGER-Iron-On Patches Assorted Sizes. This repair kit is a must have for every household. Patches are 80% Polyester and 20% Cotton. These patches are wasahable and super sealing for decorating and mending shirts, jeans, skirts and more. This 5.75x7.5 inch package contains four large 5x5 inch patches, four medium 3x3 inch patches and eight small 2x3 inch patches. Use a dry iron only, no steam. Note: Not intended for use on plastic, nylon, rayon or fabrics made of monofilament polyesters. Imported.