Iron-on patch is composed of two layers of felt cloth and soft chenille,yellow letter patches double layer felt back design is better quality, the bottom felt back is black and the second felt back is yellow,the top layered is soft yellow chenille Yellow chenille letters are 4.5 inches high, and different letter widths are different 4.5" iron on letter for clothing has a heat seal adhesive,easy iron on application,in order to be sturdiness, you can also sew it on to your clothes Varsity letter patches can be used for repair or decoration.The letter patch is suitable for preppy,costume,hoodie,team,letterman jacket,T-shirts, shirts, baseball suits, hats,backpacks, jeans, etc Letterman jacket patches can be used to DIY your own clothes, making your jacket look more fashionable and attracting others' attention on the road Letterman jacket patches can be used for repair or decoration.The letter patch is suitable for letterman jacket,T-shirts, shirts, baseball suits, hats, shoes, backpacks, jeans, etc