First, I picked out some fabric and decided to applique the letter "m" in red polka dot fabric onto the plain pink tee. Any type of lettering can be used for this. I printed this m off of the internet and cut it out. A piece of fabric big enough to color the letter m was needed to iron on the Wonder Under (the iron on adhesive). To do this, a square piece of Wonder Under the size of the fabric letter m is needed.