US Air Force Military Iron On Patch - US Air Corps WWII - 7th Air Force Logo Style of Patch - Embroidered Iron On - Heat Activated - High Quality Great for T-shirts, Hats, Jeans, Shorts, Luggage, Backpacks and Sweatshirts. Patch Size - Approx. 3" Round Use this patch to add to the appeal of clothing, uniforms, or luggage. Easily customize anything to create your own personalized look.