Is your brother in-law always weaving the flat Earth theory into every conversation. Place this patch on your favorite performance vest and show him how you feel without even having to speak to him. You: I dropped my turkey sandwich last night and tried to save it and spranged my ankle diving for it. Him: Sandwiches are flat like the Earth. This patch measures 5" x 1.5" and has an iron-on back. We use HeatNBond Ultrabond iron-on backing, but we advise our customers to use the iron-on backing at their own discretion and cannot guarantee that it will stick to all fabrics. Please make sure material is prewashed with no fabric softner prior to ironing on patch. have We recommend sewing the patch on for best results.