First cut the sleeves off at an angle as shown.
Then cut open the sides of the t-shirt on each side.
Lay open the shirt.
I made my neices "Princess Superheros"!
I found all of my design shapes on the computer and printed them on cardstock. Cut them out and then traced them onto the Wonder Under. Remember if you use letters on yours to turn them over and trace them backwards. Then when you iron them on you will be right.
I'm looking forward to seeing my Superhero nieces and nephews hunting for Easter eggs in their color coordinated capes!