Riverbyland Iron On Patches Embroidery Butterfly Assorted 10 Fabric Patches Size: 4.5x7 cm , 10 different high detail embroidered butterfly patches. Use: iron on patches. The back hot melt adhesive is pro-environment and non toxic. Suggestion: sew on after iron makes patches more firmly. These embroidered butterfly patches are great to patch holes or decorate bags, caps, backpacks and more. Washing: easy to use, easy to clean. Gentle cycle or hand washing is best.