This woven patch measures 2.5x3.75 inches.
Step 1: Set your iron at the hottest temperature setting. Don't use steam!
Step 2: Place your patch in the desired position and place a pressing cloth if you're paranoid about burning it (such as a handkerchief, sheet or pillowcase fabric) over top.
Step 3: Press the iron straight down for 35-45 seconds with as much constant pressure as possible. Try not to move it back and forth, you just wanna apply heat.
Step 4: Turn the garment inside-out and repeat steps 2 & 3.
Step 5: Allow the patch to cool down. I know you're excited, but patience is a virtue.