Inner packing: A total of 20 patches, 4 patches per color, 10 butterfly shaped patches, 2 sizes (large, small 10). Size: Large size: 8.2cmx4.8cm / 3.2 "x1.9" Small size: 4.4cmx3cm / 1.7 "x1.2" Ironing instructions: 1. Please keep the back of the patch dry before use (do not tear the plastic). 2 Blanch to cotton setting. 3 Test your fabric for heat resistance under this setting. 4 Place the decal on the surface of the cloth or curtain and cover the decal with a cotton cloth (it must be cotton and not fade). Iron for 20 - 30 seconds and hold it in place. 5 Turn the clothes inside and out. After ironing, press the back of the decal for 10-15 seconds (the specific ironing time depends on the fit). 6 If you want the decal to be safer, you can sew along the edge. 7. You can use the same color thread to sew patches on clothes without ironing at home. Note: This patch does not apply to raincoats (waterproof), high elasticity, rayon, nylon or triacetate fabrics.